Cheap flights from Seattle to St. Louis (SEA - STL)
The best prices from Seattle/Tacoma Intl to Lambert-St Louis are usually found in August or July, booked 29 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday
How to find the cheapest flight from Seattle to St. Louis
All the information you need to plan the best SEA to STL flight in 2022: compare Seattle to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.
SEA - STL | Price | $246 - $402 |
STL | Temperature | 32 - 80.6 °F |
STL | Precipitation | 2.2 - 4.7 inches |
Popular in
December
High demand for flights, 27% potential price rise
Cheapest in
August
Best time to find cheap flights, 16% potential price drop
Round-trip from
$246
From Seattle/Tacoma Intl to Lambert-St Louis
One-way from
$99
One-way flight from Seattle/Tacoma Intl to Lambert-St Louis
What is the cheapest day to fly round-trip from Seattle to St. Louis?
Flying to your destination on a Saturday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to St. Louis. Check prices with Cheapflights to find a great deal for your trip.
How far in advance should I book a flight from Seattle to St. Louis?
To save on the cost of your flight from Seattle to St. Louis, book at least 28 days before your planned departure. Booking around this time can save you about 69% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $316 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $464.
What is the cheapest month to fly from Seattle to St. Louis?
August can be a great time to fly to St. Louis from Seattle with a flight ticket averaging about $293. Cheapflights users have found deals in the month of August for as cheap as $177. The most expensive prices can be found in the month of December.
When is the cheapest time to fly from Seattle to St. Louis (SEA - STL)?
When flying from Seattle to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 20% versus a flight in the morning.
Cheap flights from Seattle to St. Louis in January, February 2022
The best prices found for SEA to STL flights for January, February
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
6h 10mLambert-St Louis
Seattle/Tacoma Intl
Nonstop
4h 40mMultiple Airlines
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
6h 10mLambert-St Louis
Seattle/Tacoma Intl
Nonstop
4h 40mMultiple Airlines
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
20h 47mLambert-St Louis
Seattle/Tacoma Intl
1 stop
25h 10mSpirit Airlines
Seattle to St. Louis 2022 flight deals
Cheap flights to St. Louis from Seattle found for this year
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
6h 41mLambert-St Louis
Seattle/Tacoma Intl
1 stop
7h 36mFrontier
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
6h 10mLambert-St Louis
Seattle/Tacoma Intl
Nonstop
4h 40mMultiple Airlines
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
6h 10mLambert-St Louis
Seattle/Tacoma Intl
Nonstop
4h 40mMultiple Airlines
Non-stop flights to St. Louis from Seattle
Save time with Seattle to St. Louis direct flight deals
Seattle/Tacoma Intl
Lambert-St Louis
Nonstop
3h 50mLambert-St Louis
Seattle/Tacoma Intl
Nonstop
4h 40mAlaska Airlines
Seattle/Tacoma Intl
Lambert-St Louis
Nonstop
3h 50mLambert-St Louis
Seattle/Tacoma Intl
Nonstop
4h 40mAlaska Airlines
Seattle/Tacoma Intl
Lambert-St Louis
Nonstop
3h 50mLambert-St Louis
Seattle/Tacoma Intl
Nonstop
4h 40mAlaska Airlines
Last minute flights from Seattle to St. Louis
Late deals on return flights to St. Louis from Seattle, departing today and this week
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
16h 29mLambert-St Louis
Seattle/Tacoma Intl
Nonstop
4h 40mMultiple Airlines
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
20h 47mLambert-St Louis
Seattle/Tacoma Intl
1 stop
25h 10mSpirit Airlines
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
20h 47mLambert-St Louis
Seattle/Tacoma Intl
1 stop
25h 10mSpirit Airlines
One-way flights to Lambert-St Louis from Seattle
The cheapest one-way flights from Seattle to St. Louis
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
6h 10mFrontier
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
6h 10mFrontier
Seattle/Tacoma Intl
Lambert-St Louis
1 stop
24h 22mSpirit Airlines
Related info for your journey
Useful info, stats and facts about Seattle to St. Louis flights.
What airports do I use to fly from Seattle to St. Louis?
If you book a flight from Seattle to St. Louis, you will be flying from Seattle/Tacoma Intl to Lambert-St Louis. Flights to Lambert-St Louis (STL) from Seattle/Tacoma Intl (SEA) take 3h 50m for a nonstop flight. There is 1 flight from Seattle/Tacoma Intl to St. Louis per day from 8 airlines.
Which airlines flying from Seattle/Tacoma Intl to Lambert-St Louis have flexible cancellations due to COVID-19?
Alaska Airlines, Delta, and Frontier are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.
Can I find flights from Seattle to St. Louis for under $200 on Cheapflights?
Yes, there are multiple flights from Seattle to St. Louis for under $200. The cheapest flight booked recently is on Frontier for just $139, but on average you can expect to pay $165.
Are there nonstop flights from Seattle to St. Louis for under $200 on Cheapflights?
Cheapflights has at least 20 direct flights from Seattle to St. Louis under $200. A good price for a nonstop flight from Seattle to St. Louis is less than $248.
Are there last-minute flights available from Seattle to St. Louis for under $200?
There are currently 20+ open flights from Seattle to St. Louis within the next 7 days for less than $200.
How popular is this Seattle to St. Louis flight route?
The Seattle/Tacoma Intl to Lambert-St Louis flight path was viewed by 47 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
What are the cheapest airlines flying from Seattle to St. Louis round-trip?
Cheapflights users have booked flights from Seattle to St. Louis round-trip from $139. Other airlines that can offer you cheap pricing are Spirit Airlines, from $154, and Alaska Airlines, from $178. These flights start at 52% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Seattle to St. Louis one-way?
$61 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Spirit Airlines and Alaska Airlines, with prices starting from $75 and $89, respectively.
What are the most popular airlines that fly from Seattle to St. Louis?
Major Airline, American Airlines and Alaska Airlines are the most popular airlines when flying from Seattle to St. Louis.
What are the most reliable airlines from Seattle to St. Louis?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to St. Louis on time: Southwest (100%), Alaska Airlines (72%), Singapore Airlines (36%).
What are the cheapest flights from Seattle to St. Louis?
The cheapest flight price from Seattle to St. Louis is $98. On average you can expect to pay $470. The most popular route, (Seattle/Tacoma Intl - Lambert-St Louis), can usually be booked for $153.
Other flights from Seattle
Flights to St. Louis from Seattle
Can I fly to Lambert-St Louis from Seattle/Tacoma Intl right now?
Most visitors from Seattle/Tacoma Intl need to provide a negative COVID-19 test result and/or quarantine to enter Lambert-St Louis.
COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Lambert-St Louis.
Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Lambert-St Louis.
Can I fly back to Seattle/Tacoma Intl from Lambert-St Louis?
COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Seattle/Tacoma Intl.
Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Seattle/Tacoma Intl.
Alternative routes for Seattle to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from Seattle to St. Louis
The chart below displays the airlines Cheapflights users traveling from Seattle to St. Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Hourly flight availability from Seattle to St. Louis
See what time of day planes typically take off from Seattle to St. Louis
| 30%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 70%of flight departures | Morning6 am to noon |
| 0%of flight departures | AfternoonNoon to 6 pm |
| 0%of flight departures | Evening6 pm to midnight |
Weekly flight availability from Seattle to St. Louis
See how many times per day planes take to the skies headed from Seattle to St. Louis
| Sunday | 2daily flights |
|---|---|
| Monday | 2daily flights |
| Tuesday | 1daily flight |
| Wednesday | 1daily flight |
| Thursday | 2daily flights |
| Friday | 2daily flights |
| Saturday | 1daily flight |