St Louis to Seattle Flight Route Information
| Travel Distance: | 1,706 Miles |
|---|---|
| Airlines Flying This Route: | Alaska Airlines, Southwest Airlines, Japan Airlines |
| Weekly Flights: | 25 |
| Avg. Flight Duration: | 04.15 Hours |
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10/24/2026 Find Cheap Flights from St Louis to Seattle (STL to SEA)
STL - St Louis SEA - Seattle 
Find Cheap Flights from St Louis to Seattle (STL to SEA)
Fares Starting from $126
STL - St Louis SEA - Seattle Great deal! This is the lowest price we've seen for this one way route in the last 12 hours. Prices may change and aren't guaranteed for all flights or dates. Click on the price to continue your search and check the latest available fare. Ref. id 202609~Ref:yY7gTfwz5U-SLjooEUUCcA
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Cheap Flights from St Louis to Seattle - Compare & Book Our Best Deals
With over 3 daily departures from St Louis to Seattle, this route offers great flexibility for different travel plans. Browse one-way fares from $125.12, round-trip fares , and other affordable options across different budgets. Compare flight choices, explore schedules, and book the best St Louis to Seattle deals that fit your budget and travel preferences.
Top Airlines that fly from St Louis to Seattle
Cheap Flight Deals from St Louis to Seattle
STL St Louis Sat, Oct 24
SEA Seattle
from $126
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Fares are one way/round trip. Fares incl. all fuel surcharges, taxes & fees and our service fees. Displayed fares are subject to change and cannot be guaranteed at the time of booking. See all booking terms and conditions. 202609~Ref:yY7gTfwz5U-SLjooEUUCcA
Insights about cheap flights from St Louis to Seattle – Direct Flights, Duration & Best Travel Time
When it comes to booking cheap flights, having the right information at your fingertips can make all the difference. Dive into the insights for cheap flights from St Louis to Seattle and enhance your travel experience!
Daily Flights
3
Cheapest Month
April
Avg. Flight Duration
04.15
Peak Season
October
Distance
1,706 miles
Direct Flights
102
When is the Cheapest Time to Book Flights from STL to SEA?
Explore data-powered insights and trends for flights from St Louis to Seattle. Discover average fares, cheap months to fly, when to book, and plan smarter.
What’s the cheapest day of the week to fly from St Louis to Seattle?‡
What is the cheapest month to fly from St Louis to Seattle?‡
‡This information is based on historical data from the last 365 days.
Finding Affordable Flights from St Louis to Seattle
- Plan Ahead - One of the keys to securing cheap flights from St Louis to Seattle is to plan your trip well in advance. Airlines often offer lower prices for those who book tickets months ahead. Keep an eye on special promotions and sales events, which can yield significant savings.
- Flexibility is Key - Being flexible with your travel dates can also lead to substantial cost savings. Consider flying during off-peak seasons or on weekdays when prices tend to be lower.
- Set Price Alerts - To keep tabs on flight prices, consider setting up fare alerts. These alerts will notify you when fares from St Louis to Seattle drop, giving you the opportunity to grab cheap deals.
- Consider Nearby Airports - If Seattle has multiple airports, check the prices at each one. Sometimes, flying into a nearby airport and then taking a short train or bus ride to your destination can be a much cheaper option.
- Bundle and Save - Booking your flight and accommodation together as a package can often result in significant savings. CheapOair offers these bundled deals, so make sure to explore this option.
When should I book flights from STL to SEA? ‡
‡Got flexible travel dates? Use our flight data from the past year to discover ideal time to fly from St Louis to Seattle. Find out which months and days typically offer lower fares and let CheapOair search for the best options.
CheapOair provides the predicted prices for one-way trips or round-trips with a duration of 7 days for domestic and 14 days for international trips based on historical data and available flight information. Graphs are estimates only. Prices are subject to change and can't be guaranteed until ticketed.
Estimated price for
Round-trip
‡Graphs are estimates only. Based on historical data and available flight information. Prices are subject to change and cannot be guaranteed until ticketed.
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Insights About Flying from St Louis to Seattle
Which is the high season to travel from St Louis to Seattle?
The month of October is considered the high season for flying from STL to SEA. Traveling during the high season can affect ticket prices and availability, making this data crucial for trip planning.
How many direct flights are available from STL to SEA?
There are a total of 102 direct flights from St Louis to Seattle. For travelers seeking convenience and shorter travel times, this data is important when choosing flight options.
Which is the low season to travel from St Louis to Seattle?
April is considered the low season for traveling from St Louis to Seattle, Washington. Travelers looking for cost-effective options and fewer crowds may consider traveling during this period.
How many daily flights are there between St Louis to Seattle?
There are as many as 3 daily flights available for travelers between STL to SEA. This data offers flexibility in choosing departure times that best suit your schedule.
Which is the busiest day for passengers flying between St Louis to Seattle?
Monday are the busiest days for passengers flying between St Louis to Seattle. Knowing the peak travel day can help you plan your trip to avoid overcrowded flights or airports.
What percentage of travelers spent an average of 3 days in Seattle, Washington?
Approximately 31.91% of travelers spent an average of 3 days exploring Seattle. This information can assist in planning the duration of your stay in Seattle
What percentage of STL to SEA flyers traveled with kids under 14?
About 7% of passengers on flights from St Louis to Seattle were accompanied by children under the age of 14. This information is useful if you're planning a family trip and want to know how common it is to travel with young children on this route.
What percentage of St Louis to Seattle travelers were over 60 years old?
A notable 20% of travelers were aged 60 or older. This statistic provides insights for senior travelers or those seeking a mature travel demographic.
What percentage of STL to SEA travelers were millennials?
Millennials make up a significant portion of travelers on this route, accounting for 32% of all passengers. If you're a millennial looking to connect with like-minded travelers, this statistic might interest you.
What percentage of St Louis to Seattle travelers were female?
Almost half of the passengers, approximately 54% were female. Knowing the gender distribution can be useful for solo female travelers or those interested in gender-related travel insights.
On which days one can have the most flight options in Seattle?
Monday offer the most flight options in Seattle.
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All flight facts are based on last 3 months' data except the highest and lowest booking months that are based on last 3 months' data.
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Cheap Flights from St Louis to Seattle
Looking for flights from St. Louis to Seattle? Look no more, for you're at the right place. Book cheap flights from St. Louis to Seattle on CheapOair and enjoy great discounts. Whether its leisure or a business trip, we offer the most competitive rates on flight tickets to destinations around the world. Grab STL to SEA flight deals and save big!
Airports in St. Louis
The city of St. Louis in the US state of Missouri is served by 4 airports - St. Louis Lambert International Airport, MidAmerica St. Louis Airport, Creve Coeur Airport, and Spirit of St. Louis Airport.
St. Louis is primarily served by St. Louis Lambert International Airport (also known as Lambert Field or Lambert Airport). It is located 14 miles away from downtown St. Louis. This airport is the state's largest and busiest airport with 270 daily departures to over 80 domestic and international destinations. Passengers can avail seamless connectivity between the airport and the city through a network of shuttle services, taxis, ride sharing services, light rail (MetroLink), bus service, Limousines and vans.
Explore Seattle
Seattle is the largest city in both the state of Washington and the Pacific Northwest region of North America. It is the seat of King County in the state of Washington. The city is famous for being the birthplace of rock musician Jimi Hendrix, famous rock band Nirvana, and alternative Rock movement called Grunge. Apart from music lovers, Seattle also attracts many adventure-seekers for the top-notch hiking zones located in and near the Cascade Mountains. Some of these hotspots include Mount Rainier, the Olympic Mountains, and the Puget Sound.
Things to do in Seattle
Discovery Park Loop
The number one hiking spot near Seattle, Discovery Park Loop is home to picture-perfect scenery and a nearly 3-mile-long hiking trail. One would also find small beaches, pastures, forest groves, and sand dunes here.
Rattlesnake Ledge
Located at a 45 minutes ride from Seattle, the Rattlesnake Ledge trail leads to the nearby Rattlesnake Mountain Scenic Area, an alpha zone of hiking. The best part is that footmarks and trails here are well-defined and the top awards satisfying sight of the Cedar River and few other mountains (like Mount Si) nearby.
Soaring Eagle Regional Park
The Soaring Eagle Regional Park, located about 20 miles away from Seattle, is home to 12 miles of hiking and biking trails. This park also features about 600 acres of forests, wetlands, and wildlife habitats that together are home to several black bears, bobcats, black tail deer and several species of birds.
Best Time to Fly to Seattle
The best time to visit Seattle is the summer season from June to August. You can visit the city during this time of the year to enjoy the city’s cultural festivals and events like Seattle International Film Festival, and Seattle Rock ‘n’ Roll Marathon.
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