Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Washington from $55

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 2/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Deals available from 900+ travel sites.

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

These are some of the best round-trip flight deals from St. Louis to Washington that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Washington.

Cheap last minute flights

Planning a quick getaway from St. Louis to Washington? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Washington, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to Washington

Find recent round-trip train or bus tickets from St. Louis to Washington.

All round-trip flight deals from St. Louis to Washington

The cheapest plane tickets from St. Louis to Washington found on KAYAK recently.
7:09 pm - 12:07 amSTL-PDX
6h 58m1 stop
7:35 am - 9:16 amPDX-STL
23h 41m1 stop
$120Frontier
Find Deal
Wed, Jan 29 - Tue, Feb 4
7:09 pm - 12:07 amSTL-PDX
6h 58m1 stop
10:37 am - 7:31 pmPDX-STL
6h 54m1 stop
$130Frontier
Find Deal
Wed, Jan 29 - Thu, Feb 6
3:35 pm - 8:47 pmSTL-SEA
7h 12m1 stop
5:30 am - 1:18 pmSEA-STL
5h 48m1 stop
$197Delta
Find Deal
Sat, Feb 15 - Sat, Feb 22
6:43 am - 2:24 pmSTL-SEA
9h 41m1 stop
6:15 am - 2:50 pmSEA-STL
6h 35m1 stop
$207Delta
Find Deal
Wed, Feb 12 - Thu, Feb 20
1:45 pm - 9:20 pmSTL-SEA
9h 35m2 stops
7:00 am - 3:38 pmSEA-STL
6h 38m1 stop
$222United Airlines
Find Deal
Thu, Feb 6 - Mon, Feb 10
5:05 am - 12:31 pmSTL-SEA
9h 26m1 stop
12:43 am - 10:33 amSEA-STL
7h 50m1 stop
$232American Airlines
Find Deal
Thu, Feb 13 - Wed, Feb 19
4:45 pm - 9:00 pmSTL-PDX
6h 15m1 stop
6:00 am - 4:31 pmPDX-STL
8h 31m2 stops
$232United Airlines
Find Deal
Tue, Apr 15 - Sat, Apr 19
7:00 am - 12:33 pmSTL-PDX
7h 33m1 stop
1:33 pm - 11:59 pmPDX-STL
8h 26m1 stop
$247Alaska Airlines
Find Deal
Sun, Feb 23 - Fri, Mar 7
7:00 am - 9:35 amSTL-SEA
4h 35mnonstop
8:26 am - 2:25 pmSEA-STL
3h 59mnonstop
$247Alaska Airlines
Find Deal
Wed, Feb 26 - Sat, Mar 1
5:05 am - 12:31 pmSTL-SEA
9h 26m1 stop
1:33 pm - 10:03 pmSEA-STL
6h 30m1 stop
$263American Airlines
Find Deal
Thu, Feb 13 - Sun, Feb 16
7:09 pm - 12:07 amSTL-PDX
6h 58m1 stop
$55Frontier
Find Deal
Sat, Feb 1
8:52 pm - 8:40 amSTL-PDX
13h 48m1 stop
$61Frontier
Find Deal
Sat, Mar 1
5:00 pm - 12:50 amSTL-SEA
9h 50m1 stop
$99Delta
Find Deal
Tue, Feb 18
7:20 pm - 12:09 amSTL-SEA
6h 49m1 stop
$109Delta
Find Deal
Mon, Mar 17
1:02 pm - 9:11 pmSTL-SEA
10h 09m2 stops
$114United Airlines
Find Deal
Tue, Feb 4
7:00 am - 9:35 amSTL-SEA
4h 35mnonstop
$119Alaska Airlines
Find Deal
Tue, Mar 18
3:21 pm - 5:54 pmSTL-SEA
4h 33mnonstop
$129Alaska Airlines
Find Deal
Sat, Mar 8
3:30 pm - 10:55 pmSTL-PDX
9h 25m2 stops
$151United Airlines
Find Deal
Mon, Mar 10
6:29 am - 12:52 pmSTL-PDX
8h 23m1 stop
$165American Airlines
Find Deal
Wed, Jun 11
7:00 am - 9:35 amSTL-SEA
4h 35mnonstop
$174American Airlines
Find Deal
Fri, Feb 14
8:31 pm - 9:45 amSTL-PDX
15h 14m1 stop
7:35 am - 9:16 amPDX-STL
23h 41m1 stop
$315Frontier
Find Deal
Sun, Jan 19 - Tue, Jan 21
8:31 pm - 8:50 amSTL-SEA
14h 19m1 stop
9:40 am - 7:31 pmSEA-STL
7h 51m1 stop
$386Frontier
Find Deal
Sun, Jan 19 - Mon, Feb 3
3:35 pm - 8:47 pmSTL-SEA
7h 12m1 stop
5:30 am - 1:43 pmSEA-STL
6h 13m1 stop
$388Delta
Find Deal
Sat, Jan 18 - Wed, Jan 29
6:30 am - 2:24 pmSTL-SEA
9h 54m1 stop
3:34 pm - 11:09 pmSEA-STL
5h 35m1 stop
$399Delta
Find Deal
Sat, Jan 18 - Mon, Feb 3
2:49 pm - 8:46 pmSTL-PDX
7h 57m1 stop
1:52 pm - 1:53 pmPDX-STL
22h 01m1 stop
$462Alaska Airlines
Find Deal
Mon, Jan 20 - Mon, Jan 27
7:00 am - 12:30 pmSTL-PDX
7h 30m1 stop
9:00 am - 6:09 pmPDX-STL
7h 09m1 stop
$468United Airlines
Find Deal
Fri, Jan 17 - Fri, Jan 24
7:00 am - 12:30 pmSTL-PDX
7h 30m1 stop
5:00 am - 3:38 pmPDX-STL
8h 38m2 stops
$478United Airlines
Find Deal
Fri, Jan 17 - Fri, Jan 24
2:49 pm - 5:30 pmSTL-SEA
4h 41mnonstop
6:09 pm - 11:59 pmSEA-STL
3h 50mnonstop
$537Alaska Airlines
Find Deal
Tue, Jan 21 - Fri, Jan 31
2:49 pm - 5:30 pmSTL-SEA
4h 41mnonstop
12:45 am - 10:48 amSEA-STL
8h 03m1 stop
$558American Airlines
Find Deal
Tue, Jan 21 - Thu, Jan 30
2:27 pm - 8:00 pmSTL-SEA
7h 33m1 stop
6:09 pm - 11:59 pmSEA-STL
3h 50mnonstop
$633American Airlines
Find Deal
Tue, Jan 21 - Fri, Jan 24
6:44 am - 9:14 amSTL-SEA
4h 30mnonstop
8:04 am - 2:15 pmSEA-STL
4h 11mnonstop
$237Alaska Airlines
Find Deal
Wed, Mar 19 - Tue, Mar 25
7:00 am - 9:35 amSTL-SEA
4h 35mnonstop
8:26 am - 2:25 pmSEA-STL
3h 59mnonstop
$247Alaska Airlines
Find Deal
Thu, Feb 20 - Tue, Feb 25
7:00 am - 9:35 amSTL-SEA
4h 35mnonstop
8:26 am - 2:25 pmSEA-STL
3h 59mnonstop
$257Alaska Airlines
Find Deal
Thu, Feb 20 - Mon, Feb 24
3:21 pm - 5:54 pmSTL-SEA
4h 33mnonstop
8:26 am - 2:25 pmSEA-STL
3h 59mnonstop
$267Alaska Airlines
Find Deal
Fri, Feb 21 - Tue, Feb 25
7:00 am - 9:35 amSTL-SEA
4h 35mnonstop
6:11 pm - 11:59 pmSEA-STL
3h 48mnonstop
$277Alaska Airlines
Find Deal
Tue, Mar 4 - Fri, Mar 7
3:11 pm - 5:45 pmSTL-SEA
4h 34mnonstop
8:04 am - 2:15 pmSEA-STL
4h 11mnonstop
$307Alaska Airlines
Find Deal
Thu, Mar 20 - Tue, Mar 25
7:00 am - 9:35 amSTL-SEA
4h 35mnonstop
6:11 pm - 11:59 pmSEA-STL
3h 48mnonstop
$317Alaska Airlines
Find Deal
Sun, Mar 9 - Thu, Mar 13
7:00 am - 9:35 amSTL-SEA
4h 35mnonstop
6:11 pm - 11:59 pmSEA-STL
3h 48mnonstop
$337Alaska Airlines
Find Deal
Thu, Mar 6 - Sun, Mar 16
2:49 pm - 5:30 pmSTL-SEA
4h 41mnonstop
8:00 am - 1:53 pmSEA-STL
3h 53mnonstop
$347American Airlines
Find Deal
Thu, Feb 6 - Sun, Feb 9
7:00 am - 9:35 amSTL-SEA
4h 35mnonstop
8:26 am - 2:25 pmSEA-STL
3h 59mnonstop
$367American Airlines
Find Deal
Fri, Feb 14 - Tue, Feb 18

Frontier flights from St. Louis to State of Washington

Our best Frontier deals on St. Louis to State of Washington flight tickets
Frontier
Jan 29
STL7:09 pmLambert-St Louis
6h 58m
1 stop
PDX12:07 amPortland
Feb 4
PDX7:35 amPortland
23h 41m
1 stop
STL9:16 amLambert-St Louis
Frontier
Jan 29
STL7:09 pmLambert-St Louis
6h 58m
1 stop
PDX12:07 amPortland
Feb 6
PDX10:37 amPortland
6h 54m
1 stop
STL7:31 pmLambert-St Louis
Frontier
Jan 29
STL7:09 pmLambert-St Louis
17h 52m
1 stop
PDX11:01 amPortland
Feb 4
PDX7:35 amPortland
23h 41m
1 stop
STL9:16 amLambert-St Louis

Alaska Airlines flights from St. Louis to State of Washington

Our best Alaska Airlines deals on St. Louis to State of Washington flight tickets
Alaska Airlines
Feb 26
STL7:00 amLambert-St Louis
4h 35m
SEA9:35 amSeattle/Tacoma Intl
Mar 1
SEA8:26 amSeattle/Tacoma Intl
3h 59m
STL2:25 pmLambert-St Louis
Alaska Airlines
Feb 20
STL7:00 amLambert-St Louis
4h 35m
SEA9:35 amSeattle/Tacoma Intl
Feb 24
SEA8:26 amSeattle/Tacoma Intl
3h 59m
STL2:25 pmLambert-St Louis
Alaska Airlines
Feb 21
STL3:21 pmLambert-St Louis
4h 33m
SEA5:54 pmSeattle/Tacoma Intl
Feb 25
SEA8:26 amSeattle/Tacoma Intl
3h 59m
STL2:25 pmLambert-St Louis

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 February is, on average, the cheapest month to fly to State of Washington from St. Louis, with most prices found around $266. If you aren’t able to travel to State of Washington during the month of February, 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 Friday. Travelers who choose to depart for State of Washington on a Friday will often find tickets for as low as $358. 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 $420.

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 afternoon when flights can be purchased for as low as $286. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $421 on average. Flights to State of Washington from St. Louis at noon 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 $358 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.

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

$55

Fastest flight time

4h 24m

Direct flights

Every day

Airports in State of Washington

3 airports
The best one-way flight to State of Washington from St. Louis in the past 72 hours is $55. The best round-trip flight deal from St. Louis to State of Washington found on momondo in the last 72 hours is $120.
The fastest flight from St. Louis to State of Washington takes 4h 24m
Direct flights go from St. Louis to State of Washington every day.
There are 3 airports near State of Washington: Portland (PDX), Spokane (GEG), Seattle/Tacoma Intl (SEA)

  • 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?

  • 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?


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
FrontierPriceFrom $118Free CancellationRating
6.0
3,435 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $125Free CancellationRating
6.3
8,100 reviews
Search Spirit Airlines flights
DeltaPriceFrom $190Free CancellationRating
8.0
8,511 reviews
Search Delta flights
American AirlinesPriceFrom $205Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $216Free CancellationRating
7.4
8,964 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $232Free CancellationRating
8.0
9,681 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $266Free CancellationRating
8.1
4,659 reviews
Search Southwest flights

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.


An easier way to manage your State of Washington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Tue 1/21
Tue 1/28
Email me momondo's favorite deals

Find better results for your trip to Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo