SEA to STL (Seattle to St. Louis) Flights

Last Minute Flights from SEA to STL

Price found within the past 7 days for the specified period. Click for updated prices.

Cheapest SEA to STL Flights

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
SEASt. LouisSeptember 16 to September 24$168
SEASt. LouisSeptember 10 to September 24$180
SEASt. LouisSeptember 10 to September 24$202
SEASt. LouisAugust 31 to September 6$227
PAESt. LouisSeptember 12 to September 18$310
*Prices include taxes and fees
SEA to STL Flight Details
Origin airport
Seattle - Tacoma Intl.
Origin airport IATA code
SEA
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Distance
1705 mi

Frequently asked questions

What airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Lambert-St. Louis Intl. Airport (STL)?
If you want to fly nonstop from Sea-Tac Airport to Lambert-St. Louis Intl. Airport (STL), Alaska Airlines (AS) is a top option. It operates 60 flights every month between these destinations.
How many flights are there from SEA to STL?
About 83 each day. If you're in a big hurry to get to St. Louis, see if you can grab a great last-minute deal from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) and then reserve it quick!
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
This flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will take around 6 hours and 41 minutes. Use the opportunity to read the novel that's been on your shelf for a while or catch up on some sleep.
What is the flight distance from Seattle, WA (SEA-Seattle - Tacoma Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
About 1,700 miles (2,700 1). If you fly regularly and have amassed lots of air miles, this medium-haul trip may be the time to upgrade your seating.
How many morning flights are there from SEA to STL?
Early risers, you'll be relieved to know that there are 290 morning flights from SEA to STL each week.

  • If you want to jet off with Delta Air Lines (DL), it operates 77 weekly flights that leave before noon. The 12:35AM flight is the first one of the day.
  • Another fantastic option is Alaska Airlines. This carrier has 71 early flights each week. 6:00AM is the earliest one.
  • Book a ticket with American Airlines (AA) and you'll have 54 morning flights to select from. The earliest departure time from SEA is 12:59AM.

How many afternoon flights are there from SEA to STL?
Jet off on one of the 293 afternoon and evening flights from SEA to STL per week.

  • Purchase a ticket with Alaska Airlines (AS), which has 75 flights each week that leave after midday. 12:00PM is the earliest of those departures.
  • You can also take your pick of the 67 afternoon and evening flights available with Delta Air Lines (DL) each week. 12:00PM is the first departure.
  • Otherwise you can find a flight from 12:09PM onward with American Airlines (AA). This carrier offers 64 afternoon and evening flights each week.

What is the earliest departure time out of SeaTac to St. Louis?
12:35AM is the earliest scheduled flight from SEA, landing at STL at 9:17PM. Save time in the morning by having your bags packed and ready to be tossed in the boot.
What is the latest departure time out of SeaTac to St. Louis?
From SEA, the latest flight you can get jets off at 11:59PM and comes in at STL at 9:47PM. If you're not into early starts, this flight has your name on it.
What is the average price from SeaTac to St. Louis?
Round-trip fares between SEA and STL start from around $168. When you're ready to take off, we'll help you score the best possible price. This price was available on Flights.com within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.