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.
SEADENSat, 03 Oct
Fare checked before payment No hidden charges Transparent cancellation policy 24×7 booking support
Lowest fareUS$153Delta Air Lines
Fastest2h 43mgate to gate
Options found67flights on this route
Find your flightSEA → DEN
Available Flights & Fares
Compare fares, timings and baggage. Pick the flight that suits your trip.
Prices in USD
67 flight options
Fares are checked again before payment.
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Fare RulesNon-refundable fare. Final rules are verified before booking.
AA
American Airlines
AA-3792
06:00
2026-10-03
SEATTLE (SEA)Seattle/tacoma International
8H :54 M
1 Stop
PHX
· 3h 50m Phoenix (PHX), United States
15:54
2026-10-03
Denver (DEN)Denver International
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 2 Pieces
$234
Flight DetailsSEA to DEN - 8H :54 M
Baggage InfoCheck-in 0 Pieces - Cabin 2 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Type
Non Refundable
Fare Type
AirLine Private
1 Pieces 2 Pieces
$288
Flight DetailsSEA to DEN - 8H :54 M
Baggage InfoCheck-in 1 Pieces - Cabin 2 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
AA
American Airlines
AA-4896
07:10
2026-10-03
SEATTLE (SEA)Seattle/tacoma International
9H :25 M
1 Stop
LAX
· 3h 49m Los Angeles (LAX), United States
17:35
2026-10-03
Denver (DEN)Denver International
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 2 Pieces
$234
Flight DetailsSEA to DEN - 9H :25 M
Baggage InfoCheck-in 0 Pieces - Cabin 2 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Type
Non Refundable
Fare Type
AirLine Private
1 Pieces 2 Pieces
$288
Flight DetailsSEA to DEN - 9H :25 M
Baggage InfoCheck-in 1 Pieces - Cabin 2 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
AA
American Airlines
AA-4988
12:55
2026-10-03
SEATTLE (SEA)Seattle/tacoma International
8H :46 M
1 Stop
LAX
· 3h 20m Los Angeles (LAX), United States
22:41
2026-10-03
Denver (DEN)Denver International
Non Refundable 5 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
Type
Non Refundable
Fare Type
Publish
0 Pieces 2 Pieces
$248
Flight DetailsSEA to DEN - 8H :46 M
Baggage InfoCheck-in 0 Pieces - Cabin 2 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
Type
Non Refundable
Fare Type
AirLine Private
1 Pieces 2 Pieces
$302
Flight DetailsSEA to DEN - 8H :46 M
Baggage InfoCheck-in 1 Pieces - Cabin 2 Pieces
Fare RulesNon-refundable fare. Final rules are verified before booking.
No flights match the selected filters. Clear filters or open full search.
Today's Airfare Highlights
Selected flight highlights for 03 Oct 2026.
Lowest fare$153Delta Air Lines13:39
Earliest departure$188United Airlines05:00
Shortest duration$225Alaska Airlines13:16
Night
00:00-05:59
$188United Airlines at 05:00Morning
06:00-11:59
$189Delta Air Lines at 06:00Afternoon
12:00-17:59
$153Delta Air Lines at 13:39Evening
18:00-23:59
$153Delta Air Lines at 20:00
Departure & Arrival Airport Details
Seattle (SEA)
Seattle/tacoma International
United States
GMT -8
Latitude: 47.449001
Longitude: -122.308998
Denver (DEN)
Denver International
United States
GMT -7
Latitude: 39.861698150635
Longitude: -104.672996521
Distance: Seattle (SEA), United States to Denver (DEN), United States - 1,645.07 km
Flights shown for 03 Oct 2026. View all flights opens the complete search result.
Fares and hotel rates usually run higher around these dates. Booking earlier — or shifting a day or two — often costs less.
Busiest periods: Summer travel (15 Jun – 31 Aug), Holiday season (18 Dec – 02 Jan).
12OctColumbus DayMonday · in 30 daysPeak
12OctColumbus DayMonday · in 30 daysPeak
12OctIndigenous Peoples' DayMonday · in 30 daysPeak
11NovVeterans DayWednesday · in 60 days
26NovThanksgiving DayThursday · in 75 days
25DecChristmas DayFriday · in 104 days
Fixed-date national holidays. Festivals that follow the lunar calendar shift each year and are not listed here — check the exact date for your travel year.
Compare your journey
How to travel Seattle to Denver
Every option we can actually book for you, compared on price and journey time.
Connecting flight₹18,065Longer — includes a stop56 options
Air distance is about 1,645 km. 4 airlines operate this route.
Road distance and coach duration are approximate estimates from the air distance, not a timetable.
Airlines flying from Seattle to Denver
Compare fares, stops, baggage and refundability across the airlines flying this route.
DE
Delta Air Lines Flights
from $15326 flights
Fares from
$153
Non-stop
3 in these results
Departures
26 — compare timings in the list above
UN
United Airlines Flights
from $18817 flights
Fares from
$188
Non-stop
4 in these results
Departures
17 — compare timings in the list above
AL
Alaska Airlines Flights
from $22516 flights
Fares from
$225
Non-stop
4 in these results
Departures
16 — compare timings in the list above
AM
American Airlines Flights
from $2088 flights
Fares from
$208
Non-stop
None in these results
Departures
8 — compare timings in the list above
Route Overview & Flight Facts
Fastest flight duration
2h 43m · Alaska Airlines
First departure of the day
05:00 · United Airlines
Last departure of the day
23:59 · Delta Air Lines
Options in this snapshot
67
Direct / non-stop options
11
Airport codes
Seattle–SEA, Denver–DEN
Fares and timings are indicative — the exact price is confirmed with the airline when you search.
Flight Schedule, Timings & Airfare Insights
Daily Flight Schedule & Travel Duration
Around 67 flights appear in the dated route snapshot, including 11 non-stop options. Departures run through the day — the first flight leaves around 05:00 and the last around 23:59. The fastest flight takes about 2h 43m.
Morning vs Evening Departure Fares
Lowest fare by departure window: Afternoon from $153, Evening from $153, Night from $188, Morning from $189. These observations do not predict the cheapest departure window on other dates.
Cheapest Airfare & Best Time to Book
Search your travel dates to compare current fares — prices update continuously with airline inventory.
One-Way vs Round-Trip Fare Comparison
Compare the complete cost and conditions of both options for your dates. A round-trip can have different fare and change rules from two one-way tickets. One booking may contain multiple airline PNRs; confirm baggage transfer and connection protection for separate tickets.
Online Web Check-In & Boarding Pass
Check the operating airline’s opening time and check-in deadline for each sector. Seat charges and availability depend on your fare. Use the airline reference and the links on Web Check-in.
How to Book Cheap Flights on FlyX
1
Enter your travel details
Choose one-way or round-trip, pick your dates and travellers in the search form above.
2
Compare search results
Sort or filter the Seattle–Denver results by price, departure time, stops and airline.
3
Open the fare choices
Check baggage allowance and refundability for each fare type before continuing.
4
Review the final price
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5
Pay securely
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Why Book Your Flight with FlyX?
Compare the available Seattle to Denver options by total price, stops, baggage and fare conditions. Search your dates for current availability, then review traveller details and the final price before paying.
Payment confirmation and ticket issuance are separate steps. If your booking is awaiting a PNR or ticket, follow its status and contact FlyX support when you need help. Your issued ticket contains the airline reference and itinerary. Change and cancellation charges depend on the purchased fare and any separately disclosed service fee.
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Frequently Asked Questions
Is it worth booking Seattle to Denver flights in advance?
There is no guaranteed cheapest booking window. Compare your planned dates early, check nearby dates and consider baggage, connection time and change conditions as well as price. Across the dates currently loaded for Seattle to Denver, Saturday shows the lowest fare at $153. That is an observed snapshot for these dates, not a rule that holds every week.
How far is Seattle from Denver by air?
The direct air distance between Seattle (SEA) and Denver (DEN) is about 1,645 km. Actual flight time varies with the routing the airline files and with winds on the day.
Are there non-stop flights from SEA to DEN?
Yes. 11 non-stop flights are showing on Seattle to Denver for the dates currently loaded. Use the Stops filter to see only those.
Which airlines fly Seattle to Denver?
Delta Air Lines, United Airlines, Alaska Airlines and American Airlines are showing on this route for the dates currently loaded. Fares, baggage allowance and refund rules differ by airline and by fare type, so compare the fare conditions and not only the headline price.
How long is the flight from Seattle to Denver?
The quickest non-stop Seattle to Denver flight currently loaded takes about 2h 43m. Across the non-stop options showing, block time ranges from 2h 43m to 2h 55m. Journeys with a stop take longer, since the total includes the layover.
What is the cheapest Seattle to Denver flight fare?
The lowest fare showing on Seattle to Denver for the dates currently loaded is $153. Fares on the same dates run up to $950, depending on airline, timing and fare type. Airline pricing moves continuously, so treat this as a dated observation rather than a fixed price.
What time do Seattle to Denver flights depart?
For the dates currently loaded the first departure is around 05:00 and the last is around 23:59, local time at Seattle. Use the departure-time filter on the results above to narrow to a morning, afternoon or evening slot.
Why does the price change after clicking Book Now?
Airline seat inventory and fares change continuously. Selecting Book Now runs a live fare verification with the airline so the price you approve is the price you pay - if it has moved, you see the new figure before any payment.
Before you book this route
Check the airport codes SEA–DEN, local departure and arrival dates, and every connecting airport. Connections can have different document and baggage requirements from your final destination.
Where these fares come from
The fares, durations, stops and baggage shown here come from real airline search results for this route. They are examples for the dates on this page, not a full timetable and not a locked price — run a search to see what is available for your own dates.
Last checked .
Check official travel requirements
Confirm passport, visa and transit rules for your nationality and full itinerary with the relevant government and operating airline. IATA travel-document information explains why requirements vary.
Planning more than the flight? Our United States guide covers the visa process for Indian passport holders, best time to go, how long to plan for, and which places are worth the days you have. Long-haul city breaks and national parks.
The SEA to DEN 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: 1,645.07 km.
Before you book
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Continue to Booking opens the verified fare choices, including baggage and refundability, before review.
Lowest Seattle to Denver airfare today, in 30 days and in 90 days
Cheapest Fare
Fare
Date
Airline
Departure
Lowest Airfare Today
$153
03/10/2026
Delta Air Lines
13:39
Cheapest Airfare Within 30 Days
$150
12/10/2026
Delta Air Lines
13:39
Cheapest Airfare Within 90 Days
$146
11/12/2026
Delta Air Lines
13:39
Book Seattle to Denver Flight Tickets on FlyX
Planning to fly from Seattle to Denver? 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.
Seattle to Denver Flight Distance, Duration and Time
The aerial distance between Seattle and Denver is approximately 1,645 KM. The flight duration ranges from 2H :43 M up to 14H :55 M depending on whether you book a non-stop flight or a connecting schedule with layovers.
Seattle to Denver Flight Schedule and Timing
Around 67 flights operate on this route, providing plenty of choices for your travel window. The earliest morning flight departs from Seattle at 05:00, while the last night flight leaves at 23:59. Flights depart from Seattle/tacoma International and land at Denver International.
Flight Route Details & Analysis
Flight Details
Information
Route
Seattle to Denver
Aerial Distance
1,645 KM
Flight Duration
2H :43 M - 14H :55 M
Airport Codes
Seattle - SEA, Denver - DEN
Total Flights Available
67 flights (11 direct)
First Flight Departure
Departs at 05:00
Last Flight Departure
Departs at 23:59
Early Morning Flights (12 AM - 8 AM)
17 direct/indirect flights
Morning Flights (8 AM - 12 PM)
21 direct/indirect flights
Afternoon Flights (12 PM - 4 PM)
23 direct/indirect flights
Evening Flights (4 PM - 8 PM)
2 direct/indirect flights
Night Flights (8 PM - 12 AM)
4 direct/indirect flights
Airport Information & Terminals
SEA: Seattle-Tacoma International Airport. Sea-Tac connects to downtown by light rail, while cabs are useful for Bellevue, Redmond or late-night arrivals. Rain and freeway traffic should be part of the plan.
DEN: Denver airport. Denver 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.
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Seattle/tacoma International
