How many flights depart from St. Louis to State of Washington on average per week?

As of April 2026, 38 flights take off from St. Louis and land in State of Washington each week. The most common flight departure day for this route is Sun, with 21% of weekly flights taking off on this day.

What is the cheapest airline that flies from Lambert-St Louis to Washington?

Delta, United Airlines, and American Airlines are the most popular carriers operating from Lambert-St Louis to Washington

What airlines fly to State of Washington?

Alaska Airlines, Delta and American Airlines 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 69% 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 5 per day as of April 2026. The most frequent departure time is 7:00AM, with 63% of daily flights leaving at noon.

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 April 2026, there are 7 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.

$78 Cheap Flights from St. Louis to Washington in 2026

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Find the cheapest flights from St. Louis to Washington

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:51 pm - 8:51 pm

STL

PDX

28h 00m

1 stop

8:46 pm - 6:06 pm

PDX

STL

19h 20m

1 stop

$196Frontier

Wed, May 6 - Mon, May 11

9:55 pm - 8:59 am

STL

PDX

13h 04m

1 stop

11:15 am - 7:21 pm

PDX

STL

6h 06m

1 stop

$205Frontier

Thu, Apr 23 - Sun, Apr 26

7:05 am - 12:32 pm

STL

GEG

7h 27m

1 stop

1:13 pm - 11:56 pm

GEG

STL

8h 43m

1 stop

$347American Airlines

Wed, May 6 - Wed, May 13

7:05 am - 12:32 pm

STL

GEG

7h 27m

1 stop

6:00 am - 5:21 pm

GEG

STL

9h 21m

1 stop

$352American Airlines

Thu, Apr 30 - Sat, May 2

2:20 pm - 6:23 pm

STL

GEG

6h 03m

1 stop

2:10 pm - 11:13 pm

GEG

STL

7h 03m

1 stop

$357Delta

Thu, Apr 30 - Sat, May 2

7:00 am - 12:44 pm

STL

PSC

7h 44m

1 stop

1:21 pm - 11:59 pm

PSC

STL

8h 38m

1 stop

$358Alaska Airlines

Wed, May 6 - Sat, May 9

7:00 am - 12:44 pm

STL

PSC

7h 44m

1 stop

1:21 pm - 11:59 pm

PSC

STL

8h 38m

1 stop

$377Alaska Airlines

Wed, May 6 - Sat, May 9

6:35 am - 1:45 pm

STL

GEG

9h 10m

2 stops

7:00 am - 5:55 pm

GEG

STL

8h 55m

2 stops

$397Southwest

Wed, May 6 - Wed, May 13

7:20 pm - 12:35 am

STL

GEG

7h 15m

1 stop

1:45 pm - 9:45 pm

GEG

STL

6h 00m

1 stop

$402Southwest

Fri, May 1 - Tue, May 5

1:46 pm - 12:20 am

STL

GEG

12h 34m

2 stops

6:00 am - 2:29 pm

GEG

STL

6h 29m

1 stop

$406Delta

Fri, May 1 - Tue, May 5

Delta flights from St. Louis to State of Washington

Our best Delta deals on St. Louis to State of Washington flight tickets

Delta

May 12

STL2:27 pmLambert-St Louis

5h 34m

1 stop

PDX6:01 pmPortland

May 14

PDX3:10 pmPortland

6h 11m

1 stop

STL11:21 pmLambert-St Louis

$277

Delta

May 19

STL7:59 pmLambert-St Louis

6h 13m

1 stop

SEA12:12 amSeattle/Tacoma Intl

Jun 4

SEA1:25 pmSeattle/Tacoma Intl

9h 05m

1 stop

STL12:30 amLambert-St Louis

$294

Delta

May 10

STL7:59 pmLambert-St Louis

5h 45m

1 stop

PDX11:44 pmPortland

May 14

PDX3:10 pmPortland

6h 11m

1 stop

STL11:21 pmLambert-St Louis

$297

United Airlines flights from St. Louis to State of Washington

Our best United Airlines deals on St. Louis to State of Washington flight tickets

United Airlines

Apr 28

STL6:00 amLambert-St Louis

8h 47m

1 stop

SEA12:47 pmSeattle/Tacoma Intl

May 6

SEA2:27 pmSeattle/Tacoma Intl

6h 18m

1 stop

STL10:45 pmLambert-St Louis

$249

United Airlines

May 13

STL5:59 pmLambert-St Louis

6h 55m

1 stop

PDX10:54 pmPortland

May 16

PDX2:41 pmPortland

6h 38m

1 stop

STL11:19 pmLambert-St Louis

$252

United Airlines

May 13

STL5:59 pmLambert-St Louis

6h 55m

1 stop

PDX10:54 pmPortland

May 27

PDX11:59 pmPortland

8h 08m

1 stop

STL10:07 amLambert-St Louis

$272

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Wed 5/6

6:51 pm-8:51 pm

1 stop28h 00m

Portland

Mon 5/11

8:46 pm-6:06 pm

1 stop19h 20m

$196

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Thu 4/23

9:55 pm-8:59 am

1 stop13h 04m

Portland

Sun 4/26

11:15 am-7:21 pm

1 stop6h 06m

$205

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Wed 5/6

7:05 am-12:32 pm

1 stop7h 27m

Spokane

Wed 5/13

1:13 pm-11:56 pm

1 stop8h 43m

$347

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Thu 4/30

7:05 am-12:32 pm

1 stop7h 27m

Spokane

Sat 5/2

6:00 am-5:21 pm

1 stop9h 21m

$352

Quickest round-trip

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Thu 4/30

2:20 pm-6:23 pm

1 stop6h 03m

Spokane

Sat 5/2

2:10 pm-11:13 pm

1 stop7h 03m

$357

St. LouisPasco

STL - PSC

STLPSC

Lambert-St Louis

Wed 5/6

7:00 am-12:44 pm

1 stop7h 44m

Pasco Tri Cities

Sat 5/9

1:21 pm-11:59 pm

1 stop8h 38m

$358

St. LouisPasco

STL - PSC

STLPSC

Lambert-St Louis

Wed 5/6

7:00 am-12:44 pm

1 stop7h 44m

Pasco Tri Cities

Sat 5/9

1:21 pm-11:59 pm

1 stop8h 38m

$377

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Wed 5/6

6:35 am-1:45 pm

2 stops9h 10m

Spokane

Wed 5/13

7:00 am-5:55 pm

2 stops8h 55m

$397

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Fri 5/1

7:20 pm-12:35 am

1 stop7h 15m

Spokane

Tue 5/5

1:45 pm-9:45 pm

1 stop6h 00m

$402

St. LouisSpokane

STL - GEG

STLGEG

Lambert-St Louis

Fri 5/1

1:46 pm-12:20 am

2 stops12h 34m

Spokane

Tue 5/5

6:00 am-2:29 pm

1 stop6h 29m

$406

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $237. 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 $252.

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 Tuesday. Travelers who choose to depart for State of Washington on a Tuesday will often find tickets for as low as $410. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to State of Washington for around $530.

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 $419. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $492 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 weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $319 when searching 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 $266 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	$223
Fastest flight time	4h 10m
Direct flights	Every day
Airports in State of Washington	96 airports

The best one-way flight to State of Washington from St. Louis in the past 72 hours is $223. The best round-trip flight deal from St. Louis to State of Washington found on momondo in the last 72 hours is $366.

The fastest flight from St. Louis to State of Washington takes 4h 10m

Direct flights go from St. Louis to State of Washington every day.

There are 96 airports in State of Washington. From St. Louis there are direct flights to Portland (PDX), Seattle/Tacoma Intl (SEA).

Search flight deals

Frequently asked questions about flying from St. Louis to Washington

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 April 2026, there are 7 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 (50.65% of total bookings). The next most popular plane models are Boeing 737-800 Passenger/BBJ2 (winglets) (21.20%), Boeing 737-900 Passenger/BBJ3 (winglets) (13.22%), and Boeing 737 MAX 8 (7.85%).

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
Frontier	PriceFrom $89	Free Cancellation	Rating 5.7 3,001 reviews	Search Frontier flights
Delta	PriceFrom $94	Free Cancellation	Rating 7.9 8,384 reviews	Search Delta flights
Alaska Airlines	PriceFrom $151	Free Cancellation	Rating 7.9 12,172 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $176	Free Cancellation	Rating 8.0 4,342 reviews	Search Southwest flights
United Airlines	PriceFrom $178	Free Cancellation	Rating 7.4 9,546 reviews	Search United Airlines flights
American Airlines	PriceFrom $188	Free Cancellation	Rating 7.1 11,561 reviews	Search American Airlines flights
Hawaiian Airlines	PriceFrom $198	Free Cancellation	Rating 7.8 2,838 reviews	Search Hawaiian Airlines 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.

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Cheap flights from St. Louis to Washington from $78

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 5/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from St. Louis to State of Washington

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How to get the cheapest flight ticket from St. Louis to State of Washington

What is the cheapest month to fly to State of Washington?

What is the cheapest day to depart on your flight to State of Washington?

What is the cheapest time of day to depart on your flight to State of Washington?

What is the cheapest Lambert-St Louis to Washington flight route?

How far in advance should I book a flight to State of Washington?

What cabin class options are available on Lambert-St Louis to Washington flights?

What is the cheapest airline that flies from Lambert-St Louis to Washington?

What airlines fly to State of Washington?

How many flights depart from St. Louis to State of Washington on average per day?

How many flights depart from St. Louis to State of Washington on average per week?

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

Fastest flight time

Direct flights

Airports in State of Washington

Frequently asked questions about flying from St. Louis to 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

Why use momondo?

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.

Find better results for your trip to Washington

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