$74 Find Cheap Flights from Seattle to St. Louis - Compare and Save

The use of car rentals is one of the most efficient methods of connecting travelers from STL Airport to the city center and St. Louis downtown. Car Rental Town-Saint Louis Airport is one car rental agency that provides affordable services to travelers arriving at STL Airport in St. Louis. This agency is located in STL Airport, along terminal 1.

The use of the Metrolink bus system is the most efficient and inexpensive method of connecting travelers to St. Louis downtown from STL Airport. Travelers connecting to St. Louis downtown from STL Airport pay approximately $4.00 on Metrolink buses. Apart from buses, travelers can also use rental cars to connect to St. Louis downtown from STL Airport. Consider renting a car at Car Rental Town-Saint Louis Airport Agency.

The availability of on-demand kid-friendly entertainment options on American Airlines makes it the most preferred airline for travelers flying from Seattle to St. Louis in the company of their kids. This airline offers free in-flight WI-FI services, which allows your kids to stream their favorite video games, TV shows, and music albums, eliminating boredom.

There are several hotels where travelers landing at STL Airport can stay. One hotel that is easily accessible to travelers from STL Airport is the Quality Inn Airport. This hotel is located along Natural Bridge Rd, St. Louis, and it provides free airport shuttle services to customers.

Among airlines operating Seattle to St. Louis flights:

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

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

2 airlines operate flights between Seattle and St. Louis. The airlines offering nonstop flights on this route include:

• Alaska Airlines
• Southwest

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

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 First Class
• Southwest: a cabin bag in Economy Class class

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

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

• Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $243 round-trip via Dallas/Fort Worth (DFW), compared to $454 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 JetBlue. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

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

• Denver Intl (DEN) - 46% of one-stop connections
• Salt Lake City (SLC) - 21% of one-stop connections
• Chicago O'Hare Intl (ORD) - 11% of one-stop connections
• Dallas/Fort Worth (DFW) - 8% of one-stop connections

Denver Intl (DEN) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 43% on the Seattle to St. Louis route. Tuesday is the cheapest departure day at $361 round-trip on average, while Sunday is the most expensive at $627, a difference of $266. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

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

• Earliest: departs at 8:03 am and lands at 12:02 pm
• Latest: departs at 6:08 pm and lands at 10:07 pm.

The flight takes about 3h 59m.

Last-minute fares on this route - booked within 2 weeks of departure - run 47% above the route average of $428. Book 15 weeks before departure for the lowest fares.

A nonstop flight from Seattle to St. Louis takes 3h 59m, 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.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $217 to $2,166. That means the highest observed fare was about 10x higher than the lowest one.

One-way fares from Seattle to St. Louis are currently lower than usual. Average one-way flight prices are about $105, which is 60% below the typical average for this route.

Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 6h 33m, compared with 7h 10m via Minneapolis St Paul (MSP) and 7h 25m via Dallas/Fort Worth (DFW).

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

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Round-trip flights from Seattle to St. Louis range from $295 to $598, with an average of $428 over the past 12 months. Anything below $295 counts as a good deal.

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