Cheap flights from St. Louis to Seattle (STL - SEA) from $65

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — SEA
Apr 21 — Apr 281

The best prices from Lambert-St Louis to Seattle/Tacoma Intl are usually found in November or October, booked 87 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from St. Louis to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 16, 2024.

Popular in

July

Cheapest in

November

Round-trip from

$245

One-way from

$107
High demand for flights, 31% potential price rise
Best time to find cheap flights, 26% potential price drop
From Lambert-St Louis to Seattle/Tacoma Intl
One-way flight from Lambert-St Louis to Seattle/Tacoma Intl

What is the cheapest day to fly round-trip from St. Louis to Seattle?

Leaving on a Tuesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 15% on the overall cost on flights from St. Louis to Seattle.

How far in advance should I book a flight from St. Louis to Seattle?

Find a great deal and save up to 111% by booking at least 10 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Seattle within the next two weeks, with the cheapest ticket starting at $268.

What is the cheapest month to fly from St. Louis to Seattle?

Flights from St. Louis to Seattle lean towards being more expensive in July. Prices are generally better when you fly from St. Louis to Seattle in November, with the cheapest ticket starting at $115.

When is the cheapest time to fly from St. Louis to Seattle (STL - SEA)?

Unlike in the evening, when flights are generally more expensive, you can save up to 24% on flights from St. Louis to Seattle by exploring options for tickets in the afternoon.

Cheap American Airlines flights from St. Louis to Seattle

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,185,007 searches. Data last updated April 16, 2024.
Peruse some of the lowest-priced American Airlines flights we've found from St. Louis to Seattle. Deals update often to give you more flight options matching your criteria
Sat 5/45:20 amSTL - SEA
1 stop7h 46mAmerican Airlines
Sat 5/1111:43 pmSEA - STL
1 stop8h 10mAmerican Airlines
Deal found 4/15$194
Sat 5/45:20 amSTL - SEA
1 stop7h 46mAmerican Airlines
Fri 5/101:15 amSEA - STL
1 stop7h 13mAmerican Airlines
Deal found 4/15$196
Tue 4/305:15 amSTL - SEA
1 stop9h 23mAmerican Airlines
Thu 5/211:30 pmSEA - STL
1 stop7h 20mAmerican Airlines
Deal found 4/15$225
Mon 4/293:05 pmSTL - SEA
1 stop8h 21mAmerican Airlines
Thu 5/212:59 amSEA - STL
1 stop7h 37mAmerican Airlines
Deal found 4/15$238
Mon 4/2911:26 amSTL - SEA
1 stop8h 40mAmerican Airlines
Thu 5/212:59 amSEA - STL
1 stop7h 37mAmerican Airlines
Deal found 4/16$252
Fri 4/267:01 amSTL - SEA
1 stop9h 56mAmerican Airlines
Sun 4/2812:59 amSEA - STL
1 stop7h 37mAmerican Airlines
Deal found 4/16$266
Fri 4/261:11 pmSTL - SEA
1 stop10h 59mAmerican Airlines
Sun 4/2812:59 amSEA - STL
1 stop7h 37mAmerican Airlines
Deal found 4/15$271
Wed 4/245:15 amSTL - SEA
1 stop9h 23mAmerican Airlines
Fri 4/2612:59 amSEA - STL
1 stop7h 37mAmerican Airlines
Deal found 4/15$306
Sun 4/216:05 amSTL - SEA
1 stop8h 37mAmerican Airlines
Sat 4/279:44 pmSEA - STL
1 stop10h 29mAmerican Airlines
Deal found 4/15$312
  • If you’re traveling from St. Louis to Seattle, one of the more common airlines traveling that route is American Airlines. Flights from American Airlines traveling this route typically cost $396.19 RT. This price is typically 49% more expensive than other airlines that offer St. Louis to Seattle flights. When booking this route, the cheapest RT price found was $167. The most popular departure airport in St. Louis when flying to Seattle is Lambert-St Louis Airport. The most popular airport to fly into when visiting Seattle is Seattle/Tacoma Intl Airport. When flying from St. Louis to Seattle, American Airlines flights are 13% more popular than any other airline flying that same route.

Cheap Frontier flights from St. Louis to Seattle

Explore cheap flight options specifically provided by Frontier for the route between St. Louis and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,185,007 searches. Data last updated April 16, 2024.
Take a gander at the lowest prices we've found on Frontier flights from St. Louis to Seattle. Make sure to examine the flight information before completing your reservation.
Thu 5/910:59 pmSTL - SEA
1 stop22h 31mFrontier
Sat 5/189:00 amSEA - STL
1 stop11h 49mFrontier
Deal found 4/15$114
Thu 5/910:59 pmSTL - SEA
1 stop22h 31mFrontier
Sat 5/1810:08 pmSEA - STL
1 stop22h 24mFrontier
Deal found 4/15$117
Thu 5/167:23 pmSTL - SEA
1 stop26h 41mFrontier
Tue 5/218:14 pmSEA - STL
1 stop11h 22mFrontier
Deal found 4/15$118
Thu 5/167:23 pmSTL - SEA
1 stop26h 41mFrontier
Thu 5/2311:02 pmSEA - STL
1 stop9h 11mFrontier
Deal found 4/16$127
Fri 5/310:17 pmSTL - SEA
1 stop13h 03mFrontier
Mon 5/69:00 pmSEA - STL
1 stop11h 18mFrontier
Deal found 4/15$128
Mon 5/139:53 pmSTL - SEA
1 stop13h 51mFrontier
Mon 5/208:00 pmSEA - STL
1 stop12h 13mFrontier
Deal found 4/15$142
Mon 5/139:53 pmSTL - SEA
1 stop13h 51mFrontier
Mon 5/208:00 pmSEA - STL
1 stop12h 13mFrontier
Deal found 4/15$144
Wed 5/17:51 pmSTL - SEA
1 stop22h 40mFrontier
Sat 5/112:55 pmSEA - STL
1 stop21h 34mFrontier
Deal found 4/15$149
Wed 9/47:29 pmSTL - SEA
1 stop25h 32mFrontier
Sat 9/1411:30 amSEA - STL
1 stop20h 48mFrontier
Deal found 4/15$166
  • One of the most popular airlines traveling from St. Louis to Seattle is Frontier. Flights from Frontier traveling this route typically cost $498.41 RT. This price is typically 23% cheaper than other airlines that offer St. Louis to Seattle flights. When booking this route, the cheapest RT price found was $176. Lambert-St Louis Airport is the most common St. Louis airport to take off from when flying to Seattle. Seattle/Tacoma Intl Airport is the most popular arrival airport in Seattle. When flying from St. Louis to Seattle, Frontier flights are 1% more popular than any other airline flying that same route.

Cheap St. Louis to Seattle flights in April & May 2024

Find cheap flight options from St. Louis to Seattle specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,185,007 searches. Prices were last updated on April 16, 2024.
These are some of the most attractive deals on flights from St. Louis to Seattle in 2024. More deals are always being added, so be sure to check back regularly.
Thu 5/910:59 pmSTL - SEA
1 stop22h 31mFrontier
Sat 5/189:00 amSEA - STL
1 stop11h 49mFrontier
Deal found 4/15$114
Thu 5/910:59 pmSTL - SEA
1 stop22h 31mFrontier
Sat 5/1810:08 pmSEA - STL
1 stop22h 24mFrontier
Deal found 4/15$117
Thu 5/167:23 pmSTL - SEA
1 stop26h 41mFrontier
Tue 5/218:14 pmSEA - STL
1 stop11h 22mFrontier
Deal found 4/15$118
Fri 5/310:17 pmSTL - SEA
1 stop13h 03mFrontier
Mon 5/69:00 pmSEA - STL
1 stop11h 18mFrontier
Deal found 4/15$128
Mon 5/139:53 pmSTL - SEA
1 stop13h 51mFrontier
Mon 5/208:00 pmSEA - STL
1 stop12h 13mFrontier
Deal found 4/15$142
Mon 5/139:53 pmSTL - SEA
1 stop13h 51mFrontier
Mon 5/208:00 pmSEA - STL
1 stop12h 13mFrontier
Deal found 4/15$144
Mon 4/299:53 pmSTL - SEA
1 stop13h 51mFrontier
Fri 5/310:34 pmSEA - STL
1 stop9h 13mFrontier
Deal found 4/15$149
Thu 5/910:59 pmSTL - SEA
1 stop22h 31mFrontier
Tue 6/118:12 pmSEA - STL
1 stop11h 18mFrontier
Deal found 4/15$168
Fri 5/1710:21 pmSTL - SEA
1 stop11h 49mFrontier
Tue 5/288:14 pmSEA - STL
1 stop11h 22mFrontier
Deal found 4/15$169

St. Louis to Seattle 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,185,007 searches. Data last updated April 16, 2024.
These are some of the most attractive deals on flights from St. Louis to Seattle in 2024. More deals are always being added, so be sure to check back regularly.
Thu 5/910:59 pmSTL - SEA
1 stop22h 31mFrontier
Sat 5/189:00 amSEA - STL
1 stop11h 49mFrontier
Deal found 4/15$114
Thu 5/910:59 pmSTL - SEA
1 stop22h 31mFrontier
Sat 5/1810:08 pmSEA - STL
1 stop22h 24mFrontier
Deal found 4/15$117
Thu 5/167:23 pmSTL - SEA
1 stop26h 41mFrontier
Tue 5/218:14 pmSEA - STL
1 stop11h 22mFrontier
Deal found 4/15$118
Fri 5/310:17 pmSTL - SEA
1 stop13h 03mFrontier
Mon 5/69:00 pmSEA - STL
1 stop11h 18mFrontier
Deal found 4/15$128
Mon 5/139:53 pmSTL - SEA
1 stop13h 51mFrontier
Mon 5/208:00 pmSEA - STL
1 stop12h 13mFrontier
Deal found 4/15$142
Mon 5/139:53 pmSTL - SEA
1 stop13h 51mFrontier
Mon 5/208:00 pmSEA - STL
1 stop12h 13mFrontier
Deal found 4/15$144
Mon 4/299:53 pmSTL - SEA
1 stop13h 51mFrontier
Fri 5/310:34 pmSEA - STL
1 stop9h 13mFrontier
Deal found 4/15$149
Thu 8/227:29 pmSTL - SEA
1 stop17h 19mFrontier
Sat 8/317:51 pmSEA - STL
1 stop12h 27mFrontier
Deal found 4/15$166
Thu 5/910:59 pmSTL - SEA
1 stop22h 31mFrontier
Tue 6/118:12 pmSEA - STL
1 stop11h 18mFrontier
Deal found 4/15$168

Non-stop flights to Seattle from St. Louis

Discover non-stop flight options from St. Louis to Seattle. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 3,185,007 searches. Data last updated April 16, 2024.
To help reduce your travel time, choose from one of these non-stop flights from St. Louis to Seattle. If you're looking for other options for flights from St. Louis to Seattle, make sure to update the search form at the top of page.
Thu 5/97:00 amSTL - SEA
Nonstop4h 20mAlaska Airlines
Tue 6/115:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Deal found 4/15$257
Fri 5/177:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Tue 5/285:59 pmSEA - STL
Nonstop4h 00mAlaska Airlines
Deal found 4/15$277
Wed 5/227:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Wed 5/295:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Deal found 4/15$295
Fri 6/77:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Sun 6/95:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Deal found 4/16$297
Thu 5/167:00 amSTL - SEA
Nonstop4h 14mAlaska Airlines
Tue 5/2112:43 pmSEA - STL
Nonstop3h 58mAlaska Airlines
Deal found 4/15$307
Wed 5/17:00 amSTL - SEA
Nonstop4h 20mAlaska Airlines
Wed 5/86:03 pmSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 4/16$317
Wed 5/227:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Sun 5/267:37 amSEA - STL
Nonstop3h 59mAlaska Airlines
Deal found 4/15$327
Fri 5/32:35 pmSTL - SEA
Nonstop4h 25mAlaska Airlines
Mon 5/66:03 pmSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 4/15$337
Fri 5/247:41 pmSTL - SEA
Nonstop4h 19mAlaska Airlines
Sat 5/255:58 pmSEA - STL
Nonstop4h 01mAlaska Airlines
Deal found 4/16$342

St. Louis to Seattle flights leaving soon

Find last-minute flight options from St. Louis to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,185,007 searches. Data last updated April 16, 2024.
Have a look at some of the flights available from St. Louis to Seattle departing last-minute. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Fri 4/265:35 pmSTL - SEA
1 stop28h 57mFrontier
Mon 4/299:00 pmSEA - STL
1 stop11h 18mFrontier
Deal found 4/15$178
Wed 4/249:39 pmSTL - SEA
1 stop12h 56mFrontier
Sun 4/289:20 pmSEA - STL
1 stop10h 58mFrontier
Deal found 4/15$200
Wed 4/247:51 pmSTL - SEA
1 stop22h 40mFrontier
Sat 4/279:32 pmSEA - STL
1 stop14h 57mFrontier
Deal found 4/15$208
Tue 4/234:50 pmSTL - SEA
1 stop26h 08mFrontier
Tue 5/79:35 pmSEA - STL
1 stop10h 12mFrontier
Deal found 4/15$218
Fri 4/265:35 pmSTL - SEA
1 stop28h 57mFrontier
Sun 4/289:20 pmSEA - STL
1 stop10h 58mFrontier
Deal found 4/15$220
Fri 4/262:48 pmSTL - SEA
1 stop7h 19mMultiple Airlines
Mon 4/299:55 amSEA - STL
1 stop9h 08mMultiple Airlines
Deal found 4/16$257
Tue 4/236:13 amSTL - SEA
1 stop6h 32mDelta
Mon 5/612:40 amSEA - STL
1 stop8h 30mDelta
Deal found 4/15$262
Fri 4/267:01 amSTL - SEA
1 stop9h 56mAmerican Airlines
Sun 4/2812:59 amSEA - STL
1 stop7h 37mAmerican Airlines
Deal found 4/16$266
Fri 4/261:11 pmSTL - SEA
1 stop10h 59mAmerican Airlines
Sun 4/2812:59 amSEA - STL
1 stop7h 37mAmerican Airlines
Deal found 4/15$271

One-way flights to Seattle from St. Louis

Search for one-way flight options from St. Louis to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,185,007 searches. Data last updated April 16, 2024.
If you're seeking multiple options on one-way flights from St. Louis to Seattle, be sure to check out these deals, which are updated often. Those seeking round-trip flights from St. Louis to Seattle should utilize the search form at the the top of the page.
Mon 5/69:53 pmSTL - SEA
1 stop13h 51mFrontier
Deal found 4/15$65
Wed 5/87:51 pmSTL - SEA
1 stop22h 40mFrontier
Deal found 4/15$69
Sat 5/188:04 pmSTL - SEA
1 stop13h 00mFrontier
Deal found 4/15$73
Fri 5/1010:17 pmSTL - SEA
1 stop13h 03mFrontier
Deal found 4/16$75
Fri 5/1010:17 pmSTL - SEA
1 stop13h 03mFrontier
Deal found 4/15$89
Tue 5/74:50 pmSTL - SEA
1 stop26h 08mFrontier
Deal found 4/16$90
Mon 9/237:29 pmSTL - SEA
1 stop25h 32mFrontier
Deal found 4/15$95
Thu 5/96:50 pmSTL - SEA
1 stop7h 09mDelta
Deal found 4/16$106
Sat 9/212:38 pmSTL - SEA
1 stop10h 12mAmerican Airlines
Deal found 4/15$107

Find flights from St. Louis to Seattle within your budget

Customize your flight search to find flights from St. Louis to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,185,007 searches. Data last updated April 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$114 - $281

Route

Depart

Return

Price

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Thu 5/9

1 stop22h 31m

Seattle/Tacoma Intl

Sat 5/18

1 stop11h 49m

$114

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Thu 5/9

1 stop22h 31m

Seattle/Tacoma Intl

Sat 5/18

1 stop22h 24m

$117

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Thu 5/16

1 stop26h 41m

Seattle/Tacoma Intl

Tue 5/21

1 stop11h 22m

$118

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Thu 5/16

1 stop26h 41m

Seattle/Tacoma Intl

Thu 5/23

1 stop9h 11m

$127

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Mon 5/13

1 stop14h 54m

Seattle/Tacoma Intl

Mon 5/20

2 stops12h 55m

$185

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Sat 5/4

1 stop7h 46m

Seattle/Tacoma Intl

Sat 5/11

1 stop8h 10m

$194

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Thu 5/9

1 stop7h 09m

Seattle/Tacoma Intl

Fri 5/17

1 stop8h 30m

$216

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Thu 5/9

1 stop7h 09m

Seattle/Tacoma Intl

Sat 5/18

Nonstop4h 01m

$246

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 5/14

2 stops24h 11m

Seattle/Tacoma Intl

Tue 5/21

1 stop11h 06m

$281

Flights are sorted by cheapest first

Deals found on 4/15

When is the best time to book a flight from St. Louis to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Seattle. Price data was last updated on January 28, 2024.
The best time to book flights from St. Louis to Seattle is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

When is the cheapest time to fly from St. Louis to Seattle?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Seattle. Price data was last updated on April 14, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Seattle flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Seattle by month

Plan your trip from St. Louis to Seattle by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Seattle is currently $85 while a round-trip flight costs $178. Price data was last updated on April 14, 2024.

Currently, December is the cheapest month in which you can book a flight from St. Louis to Seattle (average of $245). Flying from St. Louis to Seattle in June is currently the most expensive (average of $408). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$247

February

$254

March

$288

April

$291

May

$319

June

$408

July

$406

August

$343

September

$278

October

$256

November

$258

December

$245

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

41 - 66.2 °F

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated April 16, 2024.
See what other customers who have flown with American Airlines, Frontier and Alaska Airlines from St. Louis to Seattle have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,219 reviews

Comfort

8.1

Food

7.4

Overall

8.2

Boarding

8.3

Crew

8.8

Entertainment

7.9

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

Southwest
8.2
Very good
6,219 reviews
Southwest
8.2
Very good
6,219 reviews

Comfort

8.1

Food

7.4

Overall

8.2

Boarding

8.3

Crew

8.8

Entertainment

7.9

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

8.1
Very good
9,085 reviews
Southwest
8.2
Very good
6,219 reviews

Comfort

8.1

Food

7.4

Overall

8.2

Boarding

8.3

Crew

8.8

Entertainment

7.9

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

8.1
Very good
11,123 reviews
Southwest
8.2
Very good
6,219 reviews

Comfort

8.1

Food

7.4

Overall

8.2

Boarding

8.3

Crew

8.8

Entertainment

7.9

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

7.4
Good
11,360 reviews
Southwest
8.2
Very good
6,219 reviews

Comfort

8.1

Food

7.4

Overall

8.2

Boarding

8.3

Crew

8.8

Entertainment

7.9

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

7.3
Good
14,952 reviews
Southwest
8.2
Very good
6,219 reviews

Comfort

8.1

Food

7.4

Overall

8.2

Boarding

8.3

Crew

8.8

Entertainment

7.9

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airports do I use to fly from St. Louis to Seattle?

    Booking a flight from Lambert-St Louis (STL) to Seattle/Tacoma Intl (SEA) is your only option if you wish to fly from St. Louis to Seattle. On a typical day, there are 6 flights from Lambert-St Louis to Seattle/Tacoma Intl, all of which are around 4h 19m for a nonstop flight. You can also purchase a plane ticket from 8 airlines when you book a flight from Lambert-St Louis to Seattle.

  • Can I find flights from St. Louis to Seattle for under $200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Seattle for under $200. The cheapest flight booked recently is on Frontier for just $114, but on average you can expect to pay $158.

  • Are there nonstop flights from St. Louis to Seattle for under $300 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Seattle under $300. A good price for a nonstop flight from St. Louis to Seattle is less than $355.

  • Are there last-minute flights available from St. Louis to Seattle for under $200?

    There are currently 20+ open flights from St. Louis to Seattle within the next 7 days for less than $200.

  • What days are nonstop flights available from St. Louis to Seattle?

    Nonstop flights can be found on the following days: Saturday.

  • How popular is this St. Louis to Seattle flight route?

  • How many flights depart from St. Louis to Seattle on average per day?

    Per day, 4 flights depart from St. Louis to Seattle on average.
    Morning (6am - Noon) - 100% of flight departures

  • How long is the flight from St. Louis to Seattle?

    Airlines like Frontier and American Airlines fly from St. Louis to Seattle in about 7h 46m. The time it takes to get you to your destination can typically vary by up to 14h 45m. There are 1714 mi between St. Louis and Seattle. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from St. Louis to Seattle round-trip?

    Currently priced at $114, Frontier will fly you from St. Louis to Seattle and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on American Airlines for as low as $194. You may be able to fly from St. Louis to Seattle for 69% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from St. Louis to Seattle one-way?

    The cheapest airlines for a one-way flight from St. Louis to Seattle are Frontier ($65), Delta ($106), and American Airlines ($107).

  • What are the most popular airlines that fly from St. Louis to Seattle?

  • What are the most reliable airlines from St. Louis to Seattle?

    The top 3 most reliable airlines when flying from St. Louis to Seattle are Qatar Airways (96%), Japan Airlines (96%) and American Airlines (94%).

  • What are the cheapest flights from St. Louis to Seattle?

    Looking for the cheapest flight from St. Louis to Seattle? While on average our users pay $1,049, our data indicates the cheapest price to be $138. The most popular route (Lambert-St Louis - Seattle/Tacoma Intl), is priced around $172.

  • What does STL to SEA mean?

    STL stands for Lambert-St Louis Airport, while SEA stands for Seattle/Tacoma Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from St. Louis to Seattle that include extra baggage allowance?

    The amount of baggage you can bring depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Seattle that include hotel bookings?

    Yes. In addition to deals on St. Louis to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to see available direct flights.

  • Can I find deals for business class flights from St. Louis to Seattle?

    Yes. Cheapflights offers flight deals from St. Louis to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Seattle that allow pets onboard?

    Many airlines do offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Seattle?

    Yes, you can often find last-minute deals on St. Louis to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Seattle flight deals updated?

    The St. Louis to Seattle flight deals you see on this page were last updated on 4/15.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 7 airlines flying from St. Louis to Seattle

Discover the top 7 airlines that operate flights from St. Louis to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,185,007 searches. Data last updated April 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$143Average$231FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$155Average$309FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
DeltaCheapest$160Average$286FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapest$167Average$396FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Sun Country AirCheapest$169Average$384FlexibilityNo cancel feeOn-time83%
Search Sun Country Air flights
American AirlinesCheapest$176Average$498FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$178Average$348FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Search flights from St. Louis to Seattle by cabin class

Find flights from St. Louis to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from St. Louis to Seattle

Find hourly flight availability from St. Louis to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 16, 2024.
0%of flight departuresEarly morningMidnight to 6 am
70%of flight departuresMorning6 am to noon
30%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from St. Louis to Seattle

Explore weekly flight availability from St. Louis to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 16, 2024.
Sunday4daily flights
Monday8daily flights
Tuesday6daily flights
Wednesday4daily flights
Thursday6daily flights
Friday8daily flights
Saturday6daily flights

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations