STL to SEA

St Louis to Seattle flight ticket price

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.

STL
St Louis (STL), United StatesLambert-St Louis Intl
SEA
Seattle (SEA), United StatesSeattle/tacoma International
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Live flights for Mon, 22 Jun 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
Mon, 22 JunSTL to SEA$300 Tue, 23 JunSTL to SEA Wed, 24 JunSTL to SEA Thu, 25 JunSTL to SEA Fri, 26 JunSTL to SEA Sat, 27 JunSTL to SEA Sun, 28 JunSTL to SEA
Sort By:DepartureDurationArrivalPrice
Delta Air Lines
Delta Air Lines
DL-1371
13:59
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
10H :35 M
1 Stop
DTW · 3h 59mDetroit (DTW), United States
22:34
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$300
total fare
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-2455
14:28
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
6H :08 M
1 Stop
SLC · 0h 40mSalt Lake City (SLC), United States
18:36
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$300
total fare
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-1492
19:55
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
6H :04 M
1 Stop
SLC · 0h 37mSalt Lake City (SLC), United States
23:59
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$300
total fare
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-6213
11:10
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
10H :02 M
1 Stop
IAH · 3h 00mHouston (IAH), United States
19:12
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$322
total fare
Non Refundable 8 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-4395
11:25
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
9H :40 M
1 Stop
ORD · 3h 17mChicago (ORD), United States
19:05
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$322
total fare
Non Refundable 2 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-1382
13:13
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
7H :52 M
1 Stop
ORD · 1h 37mChicago (ORD), United States
19:05
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$322
total fare
Non Refundable 4 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-1639
17:29
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
7H :27 M
1 Stop
ORD · 1h 05mChicago (ORD), United States
22:56
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$322
total fare
Non Refundable 2 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
United Airlines
United Airlines
UA-2482
19:23
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
8H :06 M
1 Stop
SFO · 1h 16mSan Francisco (SFO), United States
01:29
2026-06-23
SEATTLE (SEA)United StatesSeattle/tacoma International
$322
total fare
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
American Airlines
American Airlines
AA-7628
06:02
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
4H :28 M
Non Stop
08:30
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$330
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-9443
19:56
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
4H :28 M
Non Stop
22:24
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$330
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
Delta Air Lines
Delta Air Lines
DL-1597
06:21
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
8H :37 M
1 Stop
MSP · 3h 13mMinneapolis (MSP), United States
12:58
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$331
total fare
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
Delta Air Lines
Delta Air Lines
DL-3185
17:36
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
8H :23 M
1 Stop
MSP · 2h 53mMinneapolis (MSP), United States
23:59
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$331
total fare
Non Refundable 9 Seat Left Economy
Check-in: 0 PiecesCabin: 1 Pieces
American Airlines
American Airlines
AA-858
05:14
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
8H :56 M
1 Stop
CLT · 1h 11mCharlotte (CLT), United States
12:10
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-2261
05:29
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
7H :20 M
1 Stop
DFW · 0h 51mDallas (DFW), United States
10:49
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-6293
06:35
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
9H :22 M
1 Stop
LAX · 2h 07mLos Angeles (LAX), United States
13:57
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 1 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-2324
07:03
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
9H :12 M
1 Stop
ORD · 3h 10mChicago (ORD), United States
14:15
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-537
07:04
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
9H :49 M
1 Stop
DFW · 3h 17mDallas (DFW), United States
14:53
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-2574
08:00
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
8H :49 M
1 Stop
PHX · 2h 08mPhoenix (PHX), United States
14:49
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-4104
09:09
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
7H :06 M
1 Stop
ORD · 1h 05mChicago (ORD), United States
14:15
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 2 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-2733
09:25
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
10H :42 M
1 Stop
CLT · 3h 06mCharlotte (CLT), United States
18:07
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-2717
12:39
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
9H :35 M
1 Stop
CLT · 1h 55mCharlotte (CLT), United States
20:14
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-4537
17:03
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
9H :38 M
1 Stop
ORD · 3h 16mChicago (ORD), United States
00:41
2026-06-23
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 1 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces

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American Airlines
American Airlines
AA-2712
17:18
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
7H :14 M
1 Stop
DFW · 0h 58mDallas (DFW), United States
22:32
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 6 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-2712
17:18
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
8H :26 M
1 Stop
DFW · 2h 07mDallas (DFW), United States
23:44
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 6 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
American Airlines
American Airlines
AA-2491
19:20
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
7H :39 M
1 Stop
DFW · 1h 21mDallas (DFW), United States
00:59
2026-06-23
SEATTLE (SEA)United StatesSeattle/tacoma International
$350
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
Alaska Airlines
Alaska Airlines
AS-473
06:02
2026-06-22
St Louis (STL)United StatesLambert-St Louis Intl
4H :28 M
Non Stop
08:30
2026-06-22
SEATTLE (SEA)United StatesSeattle/tacoma International
$357
total fare
Non Refundable 7 Seat Left Economy
Check-in: 0 PiecesCabin: 2 Pieces
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Fare highlights

Selected flight highlights for 22 Jun 2026.

Open full search
Lowest fare $300 Delta Air Lines 13:59
Earliest departure $350 American Airlines 05:14
Shortest duration $330 American Airlines 06:02
Night 00:00-05:59 $350 American Airlines at 05:14
Morning 06:00-11:59 $322 United Airlines at 11:10
Afternoon 12:00-17:59 $300 Delta Air Lines at 13:59
Evening 18:00-23:59 $300 Delta Air Lines at 19:55

St Louis to Seattle route details

St Louis (STL)

Lambert-St Louis Intl

United States

GMT -6

Latitude: 38.748697

Longitude: -90.370003

Seattle (SEA)

Seattle/tacoma International

United States

GMT -8

Latitude: 47.449001

Longitude: -122.308998

Distance: St Louis (STL), United States to Seattle (SEA), United States - 2,744.34 km
Flights shown for 22 Jun 2026. View all flights opens the complete search result.

St Louis to Seattle - what to expect when booking

The STL to SEA 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: 2,744.34 km.

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More flights from St Louis (STL)23 routes
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Frequently asked questions - St Louis to Seattle flights
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.
The approximate direct air distance between St Louis (STL) and Seattle (SEA) is 2,744.34 km. The actual flight duration and route path vary depending on airline schedules and wind conditions.
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.
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.
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.