Cheap flights from Seattle, WA to St. Louis, MO
One search, all the flights
We find you the best flight deals and travel hacks so that you can choose how to book.
Rise above all travel anxieties
With the Kiwi.com Guarantee we have your back with whatever happens.
Trusted by millions
Join over 10 million yearly travellers booking with ease.
How much do flights to St. Louis cost?
Key info about flying to St. Louis
Great deals from Seattle to St. Louis
Prices updated:
Not happy with the results? Try some of our useful filters
Search by stops
- Nonstop
- Up to 1 stop
- Up to 2 stops
Search by carrier
Search by price
Search by departure date
Prices updated:
Not happy with the results? Try some of our useful filters
Search by stops
- Nonstop
- Up to 1 stop
- Up to 2 stops
Search by carrier
Search by price
Search by departure date
Weekly direct flights
Discover the top airlines offering direct flights from Seattle to St. Louis in the next month. You’ll find the number of daily direct flights per airline in the chart.
| Airline | Mon 24.03 | Tue 25.03 | Wed 26.03 | Thu 27.03 | Fri 28.03 | Sat 29.03 | Sun 30.03 |
|---|---|---|---|---|---|---|---|
| 1 | 2 | 2 | 2 | 2 | 1 | 1 | |
| 1 | 2 | 1 | 2 | 2 | --- | 2 | |
| Weekly flights: 21 total | Daily flights: 3 average | Most flights: Tuesday 2 flights |
| Airline | Mon 31.03 | Tue 01.04 | Wed 02.04 | Thu 03.04 | Fri 04.04 | Sat 05.04 | Sun 06.04 |
|---|---|---|---|---|---|---|---|
| 2 | 2 | 2 | 2 | 2 | 1 | 1 | |
| 1 | 1 | 1 | --- | --- | --- | 1 | |
| Weekly flights: 16 total | Daily flights: 2.29 average | Most flights: Monday 2 flights |
| Airline | Mon 07.04 | Tue 08.04 | Wed 09.04 | Thu 10.04 | Fri 11.04 | Sat 12.04 | Sun 13.04 |
|---|---|---|---|---|---|---|---|
| 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
| --- | --- | --- | --- | --- | --- | --- | |
| Weekly flights: 14 total | Daily flights: 2 average | Most flights: Monday 2 flights |
| Airline | Mon 14.04 | Tue 15.04 | Wed 16.04 | Thu 17.04 | Fri 18.04 | Sat 19.04 | Sun 20.04 |
|---|---|---|---|---|---|---|---|
| 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
| --- | --- | --- | --- | --- | --- | --- | |
| Weekly flights: 14 total | Daily flights: 2 average | Most flights: Monday 2 flights |
Check-in for a flight from Seattle to St. Louis
| Name | Carrier code | IATA Code | Passport needed during booking |
|---|---|---|---|
| Hawaiian Airlines | HAL | HA | No |
| Alaska Airlines | ASA | AS | No |
Online check-in is not available for these airlines.
Weather in St. Louis
Average Weather
| Month | Average monthly max temperature | Average monthly min temperature |
| January | 3°C | -3°C |
| February | 6°C | -2°C |
| March | 13°C | 3°C |
| April | 18°C | 8°C |
| May | 24°C | 14°C |
| June | 29°C | 19°C |
| July | 31°C | 21°C |
| August | 30°C | 20°C |
| September | 27°C | 16°C |
| October | 20°C | 10°C |
| November | 12°C | 3°C |
| December | 7°C | 0°C |
14 day forecast
St. Louis travel tips
South Grand is a bohemian and well-maintained area. It is surrounded by the beautiful Tower Grove Park with many ethnic restaurants. After crossing the Mississippi, you will find yourself in a historical place – the Cahokia burial mounds, 15 km from modern St. Louis.
There are a lot of immigrants and representatives of completely different nationalities in St. Louis. More than half of the population of this city are African American. In addition, St. Louis has the largest Bosnian community outside of Bosnia and Herzegovina.
Saint Louis is home to the largest Bosnian community outside of Bosnia and Herzegovina. Don't miss the opportunity to sample some authentic Bosnian cuisine. Stop by Grbic Restaurant & Events for cevapi and sarma.
Frequently asked questions
Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.
Explore alternative trips
Flights from Seattle
Flights to St. Louis
Popular routes
Airports near Seattle
Airports near St. Louis
Get more out of Kiwi.com with our mobile application
Find out more about the Kiwi.com app on kiwi.com/mobile . With our app you can search for the best plane connections. The Kiwi.com mobile app offers cheap flights, access to hidden features, travel hacks and special offers.
Download boarding passes
One-click booking
Get exclusive offers and prices
Mobile trip notifications