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Cheap SEA to STL Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Seattle to St. Louis route information

Origin Airport Seattle - Tacoma Intl.
Destination Airport Lambert-St. Louis Intl.
Airlines Serving Alaska Airlines, American Airlines, Delta, Frontier Airlines, Sun Country Airlines, United
Flight Price $226
Distance 1,705 mi

Cheap SEA to STL Flights

  • Question : What is the cheapest day to fly?
    Answer : The cheapest day to fly from Seattle to Saint Louis is on Wednesday. If you want to save a little cash on your next vacation look for flights on that day.
  • Question : Can I change the date of my flight?
    Answer : Yes, you can change your departure date. If you want to save some funds in doing so, the cheapest day to fly in June is Wednesday. Flexibility is key when booking travel to help keep costs down.
  • Question : Which airline has the least delays from Seattle to Saint Louis?
    Answer : Booking with Southwest Airlines means you will arrive to Saint Louis around the time you were supposed to. In fact, this timely airline has a 90% on-time average. Of course, it never hurts to be prepared. If you’re on SkyWest Airlines, be sure to sign up for the delay notifications to stay up to date with your flight’s status.
  • Question : What day has the most flight time options?
    Answer : When you’re flying from SEA to STL, the day with the most flight times is Sunday, with seven different options. Thursday currently offers the least amount of flight times with only five options.
  • Question : What is the cheapest airline flying from Seattle to Saint Louis?
    Answer : Delta Air Lines is your best travel expert for finding that coveted low fare. They offer fares as low as $254, while prices for other flights can cost as much as $1,319.
  • Question : How long is the flight from SEA to STL?
    Answer : Alaska Airlines currently holds the quickest travel time with three hours and 41 minutes. So, you would arrive in Saint Louis at 11:56 PM CDT if you left Seattle at 6:15 PM PDT. Remember, there is a time change of two hours.
  • Question : How long does it take to fly from Seattle to Saint Louis?
    Answer : If you're able to take the direct flight (which is offered by Alaska Airlines), you will be able to leave SEA at 6:15 PM PDT and get to STL at 11:56 PM CDT (three hours and 41 minutes). Remember, there is a time change of two hours.