$97 Find Cheap Flights from St. Louis to Seattle - Compare and Save

These are the earliest and latest flight times available from St. Louis to Seattle:

• Earliest: departs at 6:00 am and lands at 10:38 am
• Latest: departs at 4:42 pm and lands at 9:20 pm.

The flight takes about 4h 38m.

Three cabin classes are available on flights from St. Louis to Seattle:

• Economy Class
• Business Class
• First Class

A nonstop flight from St. Louis to Seattle takes 4h 38m, covering 1,704 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

Round-trip flights from St. Louis to Seattle range from $309 to $527, with an average of $410 over the past 12 months. Anything below $309 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 46% above the $410 route average. Book 7 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $226 round-trip via Dallas/Fort Worth (DFW), compared to $438 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 family is used most often on this route, operated mainly by American Airlines and Southwest. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

Morning is the busiest departure period on St. Louis to Seattle flights, with 50% of flights leaving in that window. Afternoon departures account for 50%, evening flights for 0%, and night flights for 0%.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $227 to $2,239. That means the highest observed fare was about 10x higher than the lowest one.

Alaska Airlines is the only airline on the St. Louis to Seattle route offering in-flight Wi-Fi. Pricing depends on fare class.

One-way fares from St. Louis to Seattle are currently lower than usual. Average one-way flight prices are about $113, which is 56% below the typical average for this route.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging $61 for economy cars. Top options include:

• Fox
• Europcar
• Thrifty
• Budget
• Hertz

Flights from St. Louis to Seattle usually depart from Lambert-St Louis (STL) and arrive at Seattle/Tacoma Intl (SEA).

One-stop flights from St. Louis to Seattle most commonly connect through:

• Chicago O'Hare Intl (ORD) - 31% of one-stop connections
• Denver Intl (DEN) - 25% of one-stop connections
• Salt Lake City (SLC) - 17% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) - 8% of one-stop connections

Yes. Flexible dates can save you up to 12% on flights from St. Louis to Seattle. Tuesday is the cheapest departure day at $390 round-trip on average, while Friday is the most expensive at $443, a difference of $53.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Only Alaska Airlines operates flights between St. Louis and Seattle.

Flying via Dallas Love Field (DAL) gives the shortest average 1-stop total travel time at 6h 32m, compared with 6h 38m via Salt Lake City (SLC) and 6h 59m via Chicago Midway (MDW).

Seattle is 2 hours behind St. Louis (Pacific Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

Among airlines operating St. Louis to Seattle flights:

• Alaska Airlines: offers extra legroom; offers free seat selection
• American Airlines: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• Alaska Airlines: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag and a checked bag in Business Class
• Southwest: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Downtown Seattle is about 15 miles away from the airport. There are multiple ways to get there, although they all vary in cost, speed, and convenience. For instance, the fastest way to downtown Seattle would be by taking a taxi. They can easily be found on the third floor of the parking garage and take less than 25min. Alternatively, you can opt for public transport, which is significantly cheaper but slower than a taxi. To board your train, just head to the bridge on the fourth floor of the parking garage where the terminal is located.

Seattle Airport offers complimentary wheelchair services to aid travelers in getting from the plane to baggage claim to the ground transportation center with ease. However, due to logistics reasons, the airport mainly works with the airlines to provide these services. Therefore, the best way to get wheelchair assistance would be by booking with your airline, which will then put on a note on your reservation record informing the airport that you require special assistance.

St. Louis Lambert Airport has plenty of on-site parking options. Two are specially dedicated for long-term parking. They include Long-Term Parking Lot B and Long-Term Parking Lot C, which is split into a covered and uncovered section. Long-Term Parking Lot B is located past Daily Parking Lot A east of the terminal, while Parking Lot C is situated southwest of the airport.

St. Louis Lambert Airport has about four lounges for guests to hang out and relax while waiting for their boarding call. The American Airlines Admirals Club is located Airside on Terminal 1 near Gate C1. The Wingtips Lounge, which is open to all travelers regardless of the airline, is located in Terminal 2 near Gate E22. Here you can find a range of snacks and beverages as well as a TV, charging stations, and Wi-Fi in case you need to send a few emails before boarding your flight.