Seattle to St. Louis Flights
Everything you need to know about the SEA → STL domestic route — flight time, airlines, fares, and booking tips. Track your flight in real time with TripTrack.
✈️ Route Overview
Key facts for the Seattle to St. Louis route
🛫 Airlines on This Route
Carriers operating SEA → STL flights
| Airline | Notes |
|---|---|
| Delta | SkyMiles frequent flyer program |
| American Airlines | AAdvantage frequent flyer program |
| United | MileagePlus frequent flyer program |
| Southwest | Rapid Rewards — bags fly free |
| Alaska Airlines | Mileage Plan — generous earning rates |
| JetBlue | TrueBlue — free snacks, above-average legroom |
💡 Booking Tips
How to get the best deal on Seattle to St. Louis flights
Best Days to Fly
Avoid Monday and Friday peak business travel; midweek is cheaper
Fare Range
$100-$480 round trip. Book 3–6 weeks in advance for domestic routes, 2–3 months for international.
Red-Eye Flights
✓ Available
Overnight flights on this route can save on hotel costs and maximize your time at the destination.
Track Your Flight
Once booked, TripTrack automatically imports your flight from your confirmation email. Real-time gate changes and delay alerts — no manual entry needed.
🧳 Travel Tips for This Route
Practical advice from frequent travelers on the SEA → STL route
- 1 Hydrate well; cabin humidity drops significantly on longer flights.
- 2 Aisle seats allow easier movement on long domestic flights.
🏢 Airport Guides
Full terminal, transit, and traveler info for both airports
Track Your SEA → STL Flight — Automatically
TripTrack monitors your flight in real time — gate changes, delays, and departure updates sent to your phone the moment they happen. Connect your Gmail once and your trips appear automatically. No manual entry.
Frequently Asked Questions — Seattle to St. Louis Flights
How long is the flight from Seattle to St. Louis?
The average flight time from Seattle (SEA) to St. Louis (STL) is 3h 55m. This is an estimate including taxi, climb, and descent time — actual flight time may vary based on winds and routing.
Which airlines fly from Seattle to St. Louis?
Airlines operating the SEA to STL route include Delta, American Airlines, United and 3 more. Check each airline's website for current schedules and availability.
How far is Seattle from St. Louis?
The great-circle distance from Seattle to St. Louis is 1,705 miles (2,744 km). This is the straight-line distance — actual flight paths may be slightly longer.
What are the cheapest days to fly from Seattle to St. Louis?
Avoid Monday and Friday peak business travel; midweek is cheaper. Fares on this route typically range $100-$480 round trip.
Is there a time zone change flying from Seattle to St. Louis?
Yes — there is a +2 hours when flying from Seattle to St. Louis. TripTrack automatically shows local times for both your departure and arrival airports.
Are there red-eye flights from Seattle to St. Louis?
Yes, overnight (red-eye) flights are available on the SEA to STL route. These can be a great way to save on hotel costs and maximize time at your destination.
How can I track my Seattle to St. Louis flight in real time?
TripTrack automatically tracks your SEA to STL flight — showing real-time gate changes, delays, and departure updates. Connect your Gmail once and your booking confirmation is imported automatically. Available free on iOS and Android.