Cheap flights from St. Louis to Seattle from $60
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Seattle departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from St. Louis to Seattle
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Cheap bus & train deals from St. Louis to Seattle
All round-trip flight deals to Seattle
Alaska Airlines flights from St. Louis to Seattle
Our best Alaska Airlines deals on St. Louis to Seattle flight tickets
American Airlines flights from St. Louis to Seattle
Our best American Airlines deals on St. Louis to Seattle flight tickets
See travel insights to Seattle from
How to get the cheapest flight ticket from St. Louis to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
In general, February is the cheapest month to fly from St. Louis to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $266. If you don’t want to visit Seattle in February, then you should wait until January to fly from St. Louis, when ticket prices are also cheap, with an average price of $276.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from St. Louis is on a Friday. momondo users have found tickets for Friday departures for as low as $358. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $420.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from St. Louis in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $286 when looking at flights departing in the afternoon. Flights to Seattle are more costly at noon, with an average ticket price of $421. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Lambert-St Louis to Seattle/Tacoma Intl flight route?
Fly from Lambert-St Louis to Seattle/Tacoma Intl for the best Lambert-St Louis - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from St. Louis when booking 28 days ahead of your departure date. In general, you can expect to find flights to Seattle for around $357 when searching 28 days out. Keep in mind that you might be able to find cheaper flights to Seattle at any time. In fact, our users found flights for as low as $246 in the past 72 hours.
What cabin class options are available on Lambert-St Louis to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on Lambert-St Louis to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on St. Louis to Seattle flights?
You could potentially save up to 44% on your flight if you consider stops on a St. Louis to Seattle flight.
How have St. Louis to Seattle flight prices changed over time?
As of December 2024, prices for St. Louis to Seattle flights are approximately 19% more expensive when compared to flights at the same time last year.
How many flights depart from St. Louis to Seattle on average per day?
As of December 2024, 2 flights take off from St. Louis and land in Seattle each day. The most common flight departure time for this route is 7:00AM, with 76% of daily flights taking off at noon.
How many flights depart from St. Louis to Seattle on average per week?
The number of flights available between St. Louis and Seattle is 16 per week as of December 2024. The most frequent departure day is Wed, with 38% of weekly flights leaving on this day.
When to book flights from St. Louis to Seattle
Cheap St. Louis to Seattle (STL to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Seattle
How far is Lambert-St Louis to Seattle/Tacoma Intl by plane?
Lambert-St Louis and Seattle/Tacoma Intl are 1719.6 mi apart from one another. By plane, this route typically takes 4h 26m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport?
As of December 2024, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from St. Louis to Seattle?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from St. Louis to Seattle is Boeing 737 (48.48% of total bookings). The next most popular plane models are Boeing 737-900 Passenger/BBJ3 (winglets) (16.82%), Boeing 737-800 Passenger/BBJ2 (winglets) (13.91%), and Boeing 737 MAX 9 (9.01%).
What is the most popular airline from St. Louis to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Seattle is Alaska Airlines (67% of total bookings). The next most popular airlines are American Airlines (13%), Delta (11%), and Frontier (5%).
Best airlines flying from St. Louis to Seattle
Compare and see reviews for airlines that fly from St. Louis to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $123 | Free Cancellation | Rating 6.1 3,479 reviews | |||
| PriceFrom $125 | Free Cancellation | Rating 6.3 8,119 reviews | |||
| PriceFrom $175 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $193 | Free Cancellation | Rating 8.0 8,604 reviews | |||
| PriceFrom $221 | Free Cancellation | Rating 8.0 9,552 reviews | |||
| PriceFrom $236 | Free Cancellation | Rating 7.4 9,059 reviews | |||
| PriceFrom $266 | Free Cancellation | Rating 8.1 4,848 reviews |
Alaska Airlines Flights From St. Louis to Seattle
Alaska Airlines operates around 2 flights from St. Louis to Seattle every week. The average price of these flights found in the last 72 hours has been $417, but momondo users have found Alaska Airlines deals from St. Louis to Seattle from as low as $221 round-trip. Alaska Airlines has been scored 8.0/10 in 9,552 reviews.
American Airlines Flights From St. Louis to Seattle
Another popular option for St. Louis to Seattle flights is American Airlines (7.2/10, 10,000 ratings). American Airlines flies from St. Louis to Seattle around 3 times per week, with deals starting from $175 round-trip and rising to an average price of around $430.
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Seattle?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Seattle. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from St. Louis to Seattle with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for St. Louis to Seattle flights to just show those with flexible booking policies.
How can momondo help me find flights from St. Louis to Seattle?
Once all potential St. Louis to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from St. Louis to Seattle right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of St. Louis to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.