Cheap flights from St. Louis (STL) to Washington

STL — SEA
Aug 9 — Aug 161

How far in advance should I book a flight from St. Louis to State of Washington?

Users have found that booking a flight from St. Louis to State of Washington at least 31 days early can save you up to 32% on average compared to booking a flight this week. If booking 31 days before your flight isn’t an option for you, users have found flights from St. Louis to State of Washington for as little as $400 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $487 for flights departing within the next 3 days.

What is the cheapest month to fly from St. Louis to State of Washington?

Flights from St. Louis to State of Washington lean towards being more expensive in June. Prices are generally better when you fly from St. Louis to State of Washington in October, with the cheapest ticket starting at $126.

When is the cheapest time to fly from St. Louis to State of Washington (STL - WA)?

When flying from St. Louis to State of Washington, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap flights from St. Louis to Washington in August, September 2022

The best prices found for STL to Washington flights for August, September
Sep 6 - Sep 13
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

15h 49m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

12h 17m
$172

Spirit Airlines

Pick Dates

Deal found 8/3/22

Sep 6 - Sep 16
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

14h 36m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

11h 06m
$192

Frontier

Pick Dates

Deal found 8/2/22

Sep 3 - Sep 9
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

15h 47m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

11h 06m
$200

Multiple Airlines

Pick Dates

Deal found 8/1/22

St. Louis to Washington 2022 flight deals

Cheap flights to Washington from St. Louis found for this year
Nov 1 - Nov 9
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

9h 56m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

11h 33m
$163

Frontier

Pick Dates

Deal found 8/2/22

Nov 1 - Nov 8
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

18h 05m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

9h 48m
$164

Frontier

Pick Dates

Deal found 8/3/22

Nov 1 - Nov 8
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

18h 05m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

9h 48m
$168

Frontier

Pick Dates

Deal found 8/2/22

Cheap Frontier flights from St. Louis to Washington

Nov 1 - Nov 9
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

9h 56m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

11h 33m
$163

Frontier

Pick Dates

Deal found 8/2/22

Nov 1 - Nov 8
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

18h 05m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

9h 48m
$164

Frontier

Pick Dates

Deal found 8/3/22

Nov 1 - Nov 8
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

18h 05m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

9h 48m
$168

Frontier

Pick Dates

Deal found 8/2/22

Cheap Spirit Airlines flights from St. Louis to Washington

Aug 24 - Aug 30
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

15h 47m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

12h 00m
$172

Spirit Airlines

Pick Dates

Deal found 8/4/22

Sep 19 - Sep 28
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

15h 46m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

12h 17m
$203

Spirit Airlines

Pick Dates

Deal found 8/3/22

Sep 20 - Sep 27
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

15h 46m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

1 stop

6h 26m
$219

Spirit Airlines

Pick Dates

Deal found 8/2/22

Non-stop flights to Washington from St. Louis

Save time with St. Louis to Washington direct flight deals
Dec 3 - Dec 11
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

Nonstop

4h 44m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

Nonstop

3h 52m
$317

Alaska Airlines

Pick Dates

Deal found 8/1/22

Sep 27 - Oct 4
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

Nonstop

4h 29m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

Nonstop

3h 49m
$323

Alaska Airlines

Pick Dates

Deal found 8/3/22

Sep 10 - Sep 16
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

Nonstop

4h 25m
SEA

Seattle/Tacoma Intl

STL

Lambert-St Louis

Nonstop

3h 55m
$327

Alaska Airlines

Pick Dates

Deal found 8/1/22

Last minute flights from St. Louis to Washington

Late deals on return flights to Washington from St. Louis, departing today and this week
Aug 11 - Aug 15
STL

Lambert-St Louis

GEG

Spokane

1 stop

13h 58m
GEG

Spokane

STL

Lambert-St Louis

1 stop

20h 46m
$278

Multiple Airlines

Pick Dates

Deal found 8/1/22

Aug 11 - Aug 18
STL

Lambert-St Louis

GEG

Spokane

1 stop

12h 59m
GEG

Spokane

STL

Lambert-St Louis

2 stops

20h 26m
$288

Multiple Airlines

Pick Dates

Deal found 8/4/22

Aug 14 - Aug 15
STL

Lambert-St Louis

GEG

Spokane

1 stop

13h 58m
GEG

Spokane

STL

Lambert-St Louis

1 stop

20h 46m
$293

Multiple Airlines

Pick Dates

Deal found 8/2/22

One-way flights to Washington from St. Louis

The cheapest one-way flights from St. Louis to Washington
Sep 7
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

15h 46m
$84

Spirit Airlines

Pick Dates

Deal found 8/4/22

Sep 21
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

15h 46m
$85

Spirit Airlines

Pick Dates

Deal found 8/4/22

Aug 31
STL

Lambert-St Louis

SEA

Seattle/Tacoma Intl

1 stop

15h 47m
$86

Spirit Airlines

Pick Dates

Deal found 8/4/22

Related info for your journey

Useful info, stats and facts about St. Louis to Washington flights.

What airport do you fly from for flights from St. Louis to Washington?

For a flight from St. Louis to Washington, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

Which airlines flying from Lambert-St Louis to Washington have flexible cancellations due to COVID-19?

Some of our airline partners flying from Lambert-St Louis to Washington have new flexible policies in place due to COVID-19. Alaska Airlines, American Airlines, and Delta are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Alaska Airlines with this kind of flexibility.

Can I find flights from St. Louis to State of Washington for under $200 on Cheapflights?

Yes, there are multiple flights from St. Louis to State of Washington for under $200. The cheapest flight booked recently is on Frontier for just $163, but on average you can expect to pay $195.

Are there nonstop flights from St. Louis to State of Washington for under $400 on Cheapflights?

Cheapflights has at least 20 direct flights from St. Louis to State of Washington under $400. A good price for a nonstop flight from St. Louis to State of Washington is less than $357.

Are there last-minute flights available from St. Louis to State of Washington for under $300?

There are currently 20+ open flights from St. Louis to State of Washington within the next 7 days for less than $300.

How popular is this St. Louis to State of Washington flight route?

The Lambert-St Louis to Washington flight path was viewed by 43 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What are the cheapest airlines to fly from St. Louis to State of Washington one-way?

To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $84. Frontier flights start at $94 while deals on Delta start at $119 one-way.

What are the most popular routes from St. Louis to State of Washington?

When deciding which route to take from St. Louis to State of Washington consider Lambert-St Louis - Seattle/Tacoma Intl, Lambert-St Louis - Spokane or Lambert-St Louis - Pullman Moscow Regional as they are the most popular.

What are the most popular airlines that fly from St. Louis to State of Washington?

When booking a flight from St. Louis to State of Washington, you may want to consider flying on American Airlines, Alaska Airlines or Delta as they are the most popular for this route.

What are the most reliable airlines from St. Louis to State of Washington?

The top 3 most reliable airlines when flying from St. Louis to State of Washington are Qatar Airways (91%), Japan Airlines (87%) and American Airlines (60%).

What are the cheapest flights from St. Louis to State of Washington?

Looking for the cheapest flight from St. Louis to State of Washington? While on average our users pay $1,267, our data indicates the cheapest price to be $160. The most popular route (Lambert-St Louis - Seattle/Tacoma Intl), is priced around $200.

Destination points for flights from St. Louis to Washington

Select to see more specific information for flights from St. Louis to all places in Washington

Top 7 airlines flying from St. Louis to Washington

The chart below displays the airlines Cheapflights users traveling from St. Louis to Washington choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Juneyao AirlinesCheapest$14Average$22FlexibilityNo cancel feeOn-time66%COVID-19 safety
Search Juneyao Airlines flights
Spirit AirlinesCheapest$67Average$283FlexibilityNo cancel feeOn-time65%COVID-19 safety
Search Spirit Airlines flights
FrontierCheapest$114Average$277FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
United AirlinesCheapest$127Average$412FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
DeltaCheapest$127Average$467FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
Alaska AirlinesCheapest$163Average$474FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search Alaska Airlines flights
American AirlinesCheapest$169Average$578FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights

Hourly flight availability from St. Louis to Washington

See what time of day planes typically take off from St. Louis to Washington
1%of flight departuresEarly morningMidnight to 6 am
49%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
50%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM