Cheap flights from St. Louis to Washington from $88
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 Washington departing on 5/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
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 Washington
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Southwest flights from St. Louis to State of Washington
Our best Southwest deals on St. Louis to State of Washington flight tickets
American Airlines flights from St. Louis to State of Washington
Our best American Airlines deals on St. Louis to State of Washington flight tickets
See travel insights to Washington from
How to get the cheapest flight ticket from St. Louis to State of Washington
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 State of Washington?
The month of September is, on average, the cheapest month to fly to State of Washington from St. Louis, with most prices found around $296. If you aren’t able to travel to State of Washington during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $296.
What is the cheapest day to depart on your flight to State of Washington?
The cheapest day to depart from St. Louis to State of Washington is on a Wednesday. Travelers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as $482. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to State of Washington for around $561.
What is the cheapest time of day to depart on your flight to State of Washington?
The cheapest time of day to fly to State of Washington is in the evening when flights can be purchased for as low as $500. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $514 on average. Flights to State of Washington from St. Louis in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.
What is the cheapest Lambert-St Louis to Washington flight route?
Fly from Lambert-St Louis to Seattle/Tacoma Intl for the best Lambert-St Louis - Washington flight prices
How far in advance should I book a flight to State of Washington?
You are more likely to see cheaper flights to State of Washington from St. Louis when booking 6 weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $367 when searching 6 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from St. Louis for as low as $302 on momondo.
What cabin class options are available on Lambert-St Louis to Washington flights?
There are 4 cabin classes available to choose from on Lambert-St Louis to Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Lambert-St Louis to Washington?
Frontier, Delta, and Southwest are the most popular carriers operating from Lambert-St Louis to Washington
What airlines fly to State of Washington?
Alaska Airlines, American Airlines and Delta are the top three most popular airlines that fly to State of Washington from St. Louis according to our data. Alaska Airlines is the first choice among our users, with 66% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 7 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.
How many flights depart from St. Louis to State of Washington on average per day?
The number of flights available between St. Louis and State of Washington is 8 per day as of May 2025. The most frequent departure time is 6:00AM, with 59% of daily flights leaving at noon.
How many flights depart from St. Louis to State of Washington on average per week?
As of May 2025, 58 flights take off from St. Louis and land in State of Washington each week. The most common flight departure day for this route is Wed, with 19% of weekly flights taking off on this day.
Cheap St. Louis to State of Washington flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to State of Washington
Best Price Found | $88 |
|---|---|
Fastest flight time | 4h 05m |
Direct flights | Every day |
Airports in State of Washington | 3 airports |
When did momondo last update prices for flights from Lambert-St Louis Airport to Washington?
Prices for flights from Lambert-St Louis Airport to Washington refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Washington?
As of May 2025, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Washington.
How old do you have to be to fly from Lambert-St Louis Airport to Washington?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Washington.
What documentation or ID do you need to fly to Washington?
The travel and health documents you'll need for your trip to Washington may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from St. Louis to State of Washington?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from St. Louis to State of Washington is Boeing 737 (40.81% of total bookings). The next most popular plane models are Boeing 737 MAX 9 (21.96%), Boeing 737-900 Passenger/BBJ3 (winglets) (15.94%), and Boeing 737-800 Passenger/BBJ2 (winglets) (11.94%).
Best airlines flying from St. Louis to State of Washington
Compare and see reviews for airlines that fly from St. Louis to State of Washington with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $111 | Free Cancellation | Rating 5.9 3,287 reviews | |||
| PriceFrom $165 | Free Cancellation | Rating 8.0 7,934 reviews | |||
| PriceFrom $188 | Free Cancellation | Rating 8.0 4,294 reviews | |||
| PriceFrom $199 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $216 | Free Cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $236 | Free Cancellation | Rating 8.0 9,972 reviews | |||
| PriceFrom $237 | Free Cancellation | Rating 7.9 2,409 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Washington?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington from St. Louis.
Can I find flights from St. Louis to Washington with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for St. Louis to Washington flights to just show those with flexible booking policies.
How can momondo help me find flights from St. Louis to Washington?
Once you have performed a search for St. Louis to Washington flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from St. Louis to Washington right now. Can momondo alert me if prices change?
Price alerts on flights to Washington from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.