Are direct San Diego to St Louis flights available?
No non-stop option appears in the current route snapshot. Available itineraries may include one or more stops; use the Stops filter to compare them.
SAN to STL
San Diego to St Louis Flights from US$154 + Up to 20% Off
Compare fares, departure times, stops and baggage details for this route, then open the full search when you are ready to check current availability and complete booking.
Live fares from the airlines
No hidden charges
Transparent cancellation policy
24×7 booking support
Cheapest fareUS$154Delta Air Lines
Fastest5h 42mgate to gate
Options today71flights on this route
Live flights for Tue, 18 Aug 2026
Review fares, stops, timings and baggage. Use Search or View all flights for the complete search result.
Showing flight options for the selected travel date.
Currency: USD
Delta Air Lines
DL-729
06:15
2026-08-18
San Diego (SAN)
Lindberg Fld S. Diego
Lindberg Fld S. Diego8H :02 M
1 Stop
ATL
· 1h 45m Atlanta (ATL), United States
16:17
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$150
$154
Delta Air Lines
DL-1724
22:25
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego7H :43 M
1 Stop
ATL
· 1h 41m Atlanta (ATL), United States
08:08
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$150
$154
Delta Air Lines
DL-1724
22:25
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego9H :29 M
1 Stop
ATL
· 3h 26m Atlanta (ATL), United States
09:54
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$150
$154
American Airlines
AA-518
06:15
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego8H :09 M
1 Stop
ORD
· 2h 10m Chicago (ORD), United States
16:24
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
American Airlines
AA-3134
07:24
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego7H :00 M
1 Stop
ORD
· 1h 06m Chicago (ORD), United States
16:24
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
United Airlines
UA-2760
08:00
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego8H :04 M
1 Stop
IAH
· 2h 31m Houston (IAH), United States
18:04
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
American Airlines
AA-1055
08:00
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego8H :05 M
1 Stop
DFW
· 2h 57m Dallas (DFW), United States
18:05
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
American Airlines
AA-1793
09:40
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego5H :57 M
1 Stop
PHX
· 1h 17m Phoenix (PHX), United States
17:37
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
American Airlines
AA-1770
13:38
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego8H :04 M
1 Stop
DFW
· 2h 55m Dallas (DFW), United States
23:42
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
American Airlines
AA-1051
14:23
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego7H :19 M
1 Stop
DFW
· 2h 08m Dallas (DFW), United States
23:42
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
American Airlines
AA-3060
15:05
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego6H :37 M
1 Stop
DFW
· 1h 26m Dallas (DFW), United States
23:42
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
United Airlines
UA-1100
22:40
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego7H :59 M
1 Stop
ORD
· 2h 22m Chicago (ORD), United States
08:39
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
American Airlines
AA-2065
22:45
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego7H :39 M
1 Stop
ORD
· 1h 58m Chicago (ORD), United States
08:24
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$200
$205
Delta Air Lines
DL-712
12:32
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego8H :49 M
1 Stop
ATL
· 2h 26m Atlanta (ATL), United States
23:21
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$203
$211
Delta Air Lines
DL-540
14:00
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego7H :21 M
1 Stop
ATL
· 0h 57m Atlanta (ATL), United States
23:21
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$203
$211
Delta Air Lines
DL-2191
15:30
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego5H :56 M
1 Stop
MSP
· 0h 45m Minneapolis (MSP), United States
23:26
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$203
$211
American Airlines
AA-2131
13:11
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego9H :03 M
1 Stop
ORD
· 3h 01m Chicago (ORD), United States
00:14
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$223
$231
United Airlines
UA-2045
06:30
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego8H :04 M
1 Stop
DEN
· 3h 21m Denver (DEN), United States
16:34
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$253
$261
United Airlines
UA-1016
06:40
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego6H :58 M
1 Stop
ORD
· 1h 08m Chicago (ORD), United States
15:38
2026-08-18
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$253
$261
United Airlines
UA-1100
22:40
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego9H :32 M
1 Stop
ORD
· 3h 57m Chicago (ORD), United States
10:12
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$253
$261
United Airlines
UA-2486
16:08
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego14H :31 M
1 Stop
ORD
· 8h 51m Chicago (ORD), United States
08:39
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$258
$266
United Airlines
UA-2486
16:08
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego21H :30 M
1 Stop
ORD
· 15h 53m Chicago (ORD), United States
15:38
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$258
$266
Recommended hotels in St Louis
Stay options near the arrival city for the same travel date.
Best Western Plus Louisa
- 18199 US-23, Louisa, KY 41230 ,
Free WiFiACBreakfast
Room availability is checked live
United Airlines
UA-1100
22:40
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego14H :58 M
1 Stop
ORD
· 9h 24m Chicago (ORD), United States
15:38
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$258
$266
United Airlines
UA-1100
22:40
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego21H :20 M
1 Stop
ORD
· 15h 46m Chicago (ORD), United States
22:00
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$258
$266
American Airlines
AA-518
06:15
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego15H :59 M
1 Stop
ORD
· 10h 10m Chicago (ORD), United States
00:14
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$266
$274
American Airlines
AA-518
06:15
2026-08-18
San Diego (SAN)Lindberg Fld S. Diego
Lindberg Fld S. Diego24H :09 M
1 Stop
ORD
· 18h 10m Chicago (ORD), United States
08:24
2026-08-19
St Louis (STL)Lambert-St Louis Intl
Lambert-St Louis Intl
FLYX20 Applied
$266
$274
No flights match the selected filters. Clear filters or open full search.
Fare highlights
Selected flight highlights for 18 Aug 2026.
Lowest fare
$154
Delta Air Lines
06:15
Earliest departure
$154
Delta Air Lines
06:15
Shortest duration
$431
United Airlines
13:04
Night
00:00-05:59
No option
Open full search for more
Morning
06:00-11:59
$154
Delta Air Lines at 06:15
Afternoon
12:00-17:59
$205
American Airlines at 13:38
Evening
18:00-23:59
$154
Delta Air Lines at 22:25
San Diego to St Louis flight booking guide
Quick answers to the most common questions about flying San Diego to St Louis.
Best time or month to book
There is no permanently cheapest month because airline inventory changes continuously. As a practical starting point, compare nearby dates and begin checking international trips 6–12 weeks before departure; peak holidays may need earlier booking.
Cheapest days for this route
Among the dates currently shown, Tuesday has the lowest displayed fare at $154. This is a live snapshot, not a guaranteed weekly rule.
Baggage rules
Allowance is fare-specific, not just airline-specific. Current cards show examples such as 0 Pieces check-in baggage. Open the fare choices and verify cabin/check-in baggage before continuing.
Cancellation and refund explanation
Refundable and non-refundable labels are shown on each card. Exact airline cancellation charges, no-show rules and refund timelines are verified for the selected fare before booking; promotional discounts and applicable charges are adjusted from any refund.
Secure booking support
FlyX rechecks the live fare before payment, shows the payable amount and provides 24×7 booking support. Payment, refund, cancellation and help links are available in the footer.
Airlines flying from San Diego to St Louis
Compare fares, stops, baggage and refundability across the airlines flying this route.
American Airlines San Diego to St Louis flights
American Airlines cheap flights San Diego to St Louis
Fares start from $205 on this route.
San Diego to St Louis American Airlines flight schedule
33 departures — compare timings in the list above.
United Airlines San Diego to St Louis flights
United Airlines cheap flights San Diego to St Louis
Fares start from $205 on this route.
San Diego to St Louis United Airlines flight schedule
20 departures — compare timings in the list above.
Delta Air Lines San Diego to St Louis flights
Delta Air Lines cheap flights San Diego to St Louis
Fares start from $154 on this route.
San Diego to St Louis Delta Air Lines flight schedule
13 departures — compare timings in the list above.
Alaska Airlines San Diego to St Louis flights
Alaska Airlines cheap flights San Diego to St Louis
Fares start from $339 on this route.
San Diego to St Louis Alaska Airlines flight schedule
5 departures — compare timings in the list above.
San Diego to St Louis flight details
| Cheapest fare | US$154 · Tue, 18 Aug |
|---|---|
| Fastest flight duration | 5h 42m · United Airlines |
| First departure of the day | 06:15 · Delta Air Lines |
| Last departure of the day | 22:45 · American Airlines |
| Flights currently available | 71 |
| Popular airlines on this route | American Airlines, United Airlines, Delta Air Lines, Alaska Airlines |
| Airport codes | San Diego–SAN, St Louis–STL |
Fares and timings are indicative — the exact price is confirmed with the airline when you search.
San Diego to St Louis flight schedule, timing and fares
San Diego to St Louis flight schedule and timing
Around 71 flights operate on this route. Departures run through the day — the first flight leaves around 06:15 and the last around 22:45. The fastest flight takes about 5h 42m.
Morning vs evening San Diego–St Louis fares
Lowest fare by departure window: Morning from $154, Evening from $154, Afternoon from $205. Early-morning and late-night flights are often cheaper than peak daytime slots.
What is today’s lowest airfare from San Diego to St Louis?
The lowest fare we are currently showing is US$154, on a Tuesday departure. Airfares change through the day, so search your dates for the exact price.
Should I book one-way or round-trip for San Diego to St Louis?
Domestic fares are usually priced per leg, so two one-ways often cost about the same as a round-trip and keep your return date flexible. Round-trip is worth choosing when you want a single PNR for both legs, and eligible coupons like FLYX20 apply either way.
Which airlines should I consider for San Diego to St Louis?
American Airlines (33 flights, from $205), United Airlines (20 flights, from $205), Delta Air Lines (13 flights, from $154), Alaska Airlines (5 flights, from $339). Compare fare type, baggage and refundability — the cheapest airline is not always the best value for your dates.
Web check-in for your San Diego to St Louis flight
Most airlines open web check-in 24–48 hours before departure on their own website or app using your PNR. Checking in early lets you pick better seats free of charge on many fares; FlyX also links every booking’s airline check-in page from Web Check-in.
How to book a San Diego to St Louis flight on FlyX
- 1Enter your travel details
Choose one-way or round-trip, pick your dates and travellers in the search form above.
- 2Compare live results
Sort or filter the San Diego–St Louis results by price, departure time, stops and airline.
- 3Open the fare choices
Check baggage allowance and refundability for each fare type before continuing.
- 4Review the final price
FlyX rechecks the live fare with the airline; any eligible coupon is applied automatically.
- 5Pay securely
UPI, cards, net banking and wallets supported; your e-ticket is emailed within minutes.
Why book your San Diego to St Louis flight with FlyX?
If you are looking for San Diego to St Louis flight tickets at the best possible fare, FlyX keeps the process simple and transparent. Enter your dates and travellers, compare live fares across every major airline on this route, and filter by price, departure time, stops or airline to find the flight that actually fits your plan. Every fare you see is rechecked live with the airline before payment, so the price you approve is the price you pay — no hidden charges added at checkout.
And that is not all — eligible discounts like FLYX20 are applied automatically on the review page, payments run over 256-bit SSL with UPI, cards, net banking and wallets, and our 24x7 support team backs every booking as an IATA-accredited travel company. Refund and cancellation rules are shown clearly for each fare before you pay, and your e-ticket lands in your inbox within minutes. So why wait? Book your San Diego to St Louis flight on FlyX and take off with genuine savings today.
San Diego to St Louis flight offers & coupon codes
| Coupon code | Offer | Max saving |
|---|---|---|
| FLYX20 | Up to 20% Off on Flights | ₹1,500 |
Your discount is applied automatically on the review page before you pay. View full terms.
Frequently asked questions - San Diego to St Louis flights
Is it worth booking San Diego to St Louis flights in advance?
Yes, booking flights in advance helps you secure cheap flight tickets. Comparing air ticket prices 3–4 weeks early gives you better visibility of airline timings, baggage policies, and fare rules before high-demand periods push prices up.
How far is San Diego from St Louis by air?
The approximate direct air distance between San Diego (SAN) and St Louis (STL) is 2,501.17 km. The actual flight duration and route path vary depending on airline schedules and wind conditions.
Are there non-stop flights from SAN to STL?
Non-stop flight availability depends on the airline schedule and departure date. You can filter the live search results by stops to view direct flights, one-stop connections, and transit flights instantly.
Why does the price change after clicking Book Now?
Airline seat inventory and airfares change dynamically in real-time. Selecting 'Book Now' runs a live fare verification check to ensure you get the most accurate price before final booking confirmation.
Can I compare nearby dates?
Yes, you can easily compare flights for nearby dates. Select any date on the date calendar strip to refresh the fares, compare air ticket pricing, and choose the most budget-friendly travel day.
San Diego to St Louis - what to expect when booking
The SAN to STL cards above show selected flight options. Airline prices and seat availability can move quickly, so the final fare is rechecked in the booking flow.
Approx route distance: 2,501.17 km.
Before you book
Compare nearby dates
The date strip opens the complete search result for the route and selected date.
Use filters
Shortlist by price, stops, departure time and refundable fare preference.
Check fare choices
Continue to Booking opens the verified fare choices, including baggage and refundability, before review.
Book Cheapest Flight from San Diego to St Louis on FlyX
Securing the best airfare from San Diego to St Louis is all about planning. FlyX's real-time fare tracking system allows you to check flight options and lock in the lowest ticket prices before they rise:
- Book at least 3-4 weeks in advance to secure the most competitive San Diego to St Louis airfares.
- Consider traveling mid-week (Tuesdays or Wednesdays) to bypass weekend pricing surges.
- Early morning or late-night departure flights consistently offer lower fares than afternoon slots.
- Use our live calendar view above to easily spot fare changes on nearby dates.
Find the Lowest airfare from San Diego to St Louis
| Cheapest Fare | Fare | Date | Airline | Departure |
|---|---|---|---|---|
| Lowest Airfare Today | $154 | 18/08/2026 | Delta Air Lines | 06:15 |
| Cheapest Airfare Within 30 Days | $151 | 29/08/2026 | Delta Air Lines | 06:15 |
| Cheapest Airfare Within 90 Days | $147 | 28/10/2026 | Delta Air Lines | 06:15 |
Book San Diego to St Louis Flight Tickets on FlyX
Planning to fly from San Diego to St Louis? FlyX lets you compare flight rates, airline timings, layovers, and baggage allowances all in one simple list. From quick non-stop routes to flexible connecting options, finding and booking cheap air tickets has never been easier.
San Diego to St Louis Flight Distance, Duration and Time
The aerial distance between San Diego and St Louis is approximately 2,501 KM. The flight duration ranges from 5H :42 M up to 28H :39 M depending on whether you book a non-stop flight or a connecting schedule with layovers.
San Diego to St Louis Flight Schedule and Timing
Around 71 flights operate on this route, providing plenty of choices for your travel window. The earliest morning flight departs from San Diego at 06:15, while the last night flight leaves at 22:45. Flights depart from Lindberg Fld S. Diego and land at Lambert-St Louis Intl.
Flight Route Details & Analysis
| Flight Details | Information |
|---|---|
| Route | San Diego to St Louis |
| Aerial Distance | 2,501 KM |
| Flight Duration | 5H :42 M - 28H :39 M |
| Airport Codes | San Diego - SAN, St Louis - STL |
| Total Flights Available | 71 flights (0 direct) |
| First Flight Departure | Departs at 06:15 |
| Last Flight Departure | Departs at 22:45 |
| Early Morning Flights (12 AM - 8 AM) | 26 direct/indirect flights |
| Morning Flights (8 AM - 12 PM) | 16 direct/indirect flights |
| Afternoon Flights (12 PM - 4 PM) | 15 direct/indirect flights |
| Evening Flights (4 PM - 8 PM) | 2 direct/indirect flights |
| Night Flights (8 PM - 12 AM) | 12 direct/indirect flights |
Airport Information & Terminals
SAN: San Diego airport. San Diego airport transfer should be matched to the exact hotel, suburb or meeting area. Rail can work well for light luggage, but late arrivals, winter weather and family baggage often make a direct cab or booked transfer easier.
STL: St. Louis airport. St. Louis airport transfer should be matched to the exact hotel, suburb or meeting area. Rail can work well for light luggage, but late arrivals, winter weather and family baggage often make a direct cab or booked transfer easier.
STL: St. Louis airport. St. Louis airport transfer should be matched to the exact hotel, suburb or meeting area. Rail can work well for light luggage, but late arrivals, winter weather and family baggage often make a direct cab or booked transfer easier.
