Cheap flights from Seattle to St Louis

Round-trip
Economy
Seattle (SEA)
St. Louis (STL)
Depart
Return
Any month
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How to find the cheapest flight from
Seattle (SEA) to St Louis (STL)

All the information you need to plan the best SEA to STL flight in 2021: compare Seattle to St Louis flight prices with the expected peak season, weather and rainfall in St Louis.
SEA - STL
Price
C$ 298 - C$ 487
STL
Temperature
7 - 32 °C
STL
Rainfall
57 - 130 mm

Popular in

December

High demand for flights, 27% potential price rise

Cheapest in

August

Best time to find cheap flights, 16% potential price drop

Average price

C$ 382

Average for round-trip flights in May 2021

Round-trip from

C$ 298

From Seattle to St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Seattle to St Louis?

Monday flights are found to be more expensive to fly from Seattle to St Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St Louis.

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

Travellers have found it’s best to book a flight 39 days in advance to save up to 26% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 39 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Seattle to St Louis 1-2 weeks in advance for as low as C$ 551, or C$ 657 for flights within the next 24 hours.

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

February is one of the best times of the year to fly to St Louis from Seattle. Prices for February average C$ 518 per person but you can even find prices for as low as C$ 208. The most expensive prices can be found in the month of June. Opting for a February flight can save you 29% on your journey compared to booking in February

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to St Louis as you normally would.

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Seattle</span> to <span class="emphasized">St Louis</span> flights.

Flight FAQs

From Seattle to St Louis

What days are direct flights available from Seattle to St Louis?

You can find direct flights on the following days: Tuesday.

How popular is this flight route?

This flight path from Seattle/Tacoma Intl to Lambert-St Louis was viewed by 13 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

1 flight departure from Seattle/Tacoma Intl to Lambert-St Louis per day on average.
Afternoon (Noon - 6pm) - 100% of flight departures

Does it rain more in Seattle or St Louis?

In Seattle, there will be less rainfall in Seattle compared to St Louis over the next 17 days.

Is Seattle weather warmer or cooler than St Louis?

With an average temperature of 32 °C, peak weather can be found in July. As a traveller, expect to see changes in flight prices during that period. The temperatures in St Louis are hotter than in Seattle.

Destination information for St Louis

Things to know before you go - useful duration and weather info for your trip from Seattle to St Louis.
Average temperature for May in St Louis
26.0 °C
Avg rainfall for May in St Louis
130.0 mm

Airports servicing Seattle

Airports servicing St. Louis

Hourly flight availability from Seattle to St Louis

See what time of day planes typically take off from Seattle towards St Louis.
Morning 6 AM to noon 50% of flight departures
Afternoon Noon to 6 PM 50% of flight departures
Early morning Midnight to 6 AM 0% of flight departures
Evening 6 PM to midnight 0% of flight departures
Midnight
6 AM
Noon
6 PM
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
2 daily flights
Monday
2 daily flights
Tuesday
2 daily flights
Wednesday
1 daily flight
Thursday
3 daily flights
Friday
2 daily flights
Saturday
2 daily flights
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