Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Pittsburgh to St. Louis from $80

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Pittsburgh to St. Louis departing on 5/19. 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

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 Pittsburgh to St. Louis

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Pittsburgh to St. Louis.
American Airlines Logo
11:28 am - 6:33 pmPIT-STL
8h 05m1 stop
American Airlines Logo
6:00 am - 3:45 pmSTL-PIT
8h 45m1 stop
$171American Airlines
Find Deal
Wed, May 21 - Wed, May 28
Frontier Logo
6:14 pm - 12:06 amPIT-STL
6h 52m1 stop
Frontier Logo
5:45 pm - 5:24 pmSTL-PIT
22h 39m1 stop
$180Frontier
Find Deal
Mon, May 12 - Thu, May 15
Southwest Logo
4:00 pm - 4:45 pmPIT-STL
1h 45mnonstop
Southwest Logo
12:45 pm - 3:20 pmSTL-PIT
1h 35mnonstop
$239Southwest
Find Deal
Wed, May 21 - Wed, May 28
Southwest Logo
2:25 pm - 7:20 pmPIT-STL
5h 55m1 stop
Southwest Logo
12:45 pm - 3:20 pmSTL-PIT
1h 35mnonstop
$242Southwest
Find Deal
Wed, May 21 - Wed, May 28
Delta Logo
4:33 pm - 9:34 pmPIT-STL
6h 01m1 stop
Delta Logo
5:23 pm - 12:36 amSTL-PIT
6h 13m1 stop
$259Delta
Find Deal
Fri, Jun 27 - Sun, Jun 29
Delta Logo
7:49 pm - 11:38 pmPIT-STL
4h 49m1 stop
Delta Logo
7:06 pm - 12:21 amSTL-PIT
4h 15m1 stop
$289Delta
Find Deal
Mon, May 12 - Thu, May 15
United Airlines Logo
8:50 am - 12:20 pmPIT-STL
4h 30m1 stop
United Airlines Logo
9:50 am - 3:23 pmSTL-PIT
4h 33m1 stop
$315United Airlines
Find Deal
Tue, Jun 3 - Wed, Jun 4
Spirit Airlines Logo
7:00 am - 9:15 amPIT-STL
27h 15m1 stop
Spirit Airlines Logo
10:10 am - 11:36 amSTL-PIT
24h 26m2 stops
$384Spirit Airlines
Find Deal
Wed, May 7 - Sun, May 11
United Airlines Logo
10:55 am - 2:47 pmPIT-STL
4h 52m1 stop
United Airlines Logo
8:00 am - 3:24 pmSTL-PIT
6h 24m1 stop
$389United Airlines
Find Deal
Thu, May 8 - Mon, May 12
Spirit Airlines Logo
7:00 am - 9:15 amPIT-STL
27h 15m1 stop
Spirit Airlines Logo
10:10 am - 11:36 amSTL-PIT
24h 26m2 stops
$410Spirit Airlines
Find Deal
Fri, May 9 - Sun, May 11

Delta flights from Pittsburgh to St. Louis

Our best Delta deals on Pittsburgh to St. Louis flight tickets
Delta
Jun 27
PIT4:33 pmPittsburgh
6h 01m
1 stop
STL9:34 pmLambert-St Louis
Jun 29
STL5:23 pmLambert-St Louis
6h 13m
1 stop
PIT12:36 amPittsburgh
Delta
May 12
PIT7:49 pmPittsburgh
4h 49m
1 stop
STL11:38 pmLambert-St Louis
May 15
STL7:06 pmLambert-St Louis
4h 15m
1 stop
PIT12:21 amPittsburgh
Delta
Jun 15
PIT6:30 amPittsburgh
4h 07m
1 stop
STL9:37 amLambert-St Louis
Jun 22
STL7:10 pmLambert-St Louis
4h 26m
1 stop
PIT12:36 amPittsburgh

Frontier flights from Pittsburgh to St. Louis

Our best Frontier deals on Pittsburgh to St. Louis flight tickets
Frontier
May 12
PIT6:14 pmPittsburgh
6h 52m
1 stop
STL12:06 amLambert-St Louis
May 15
STL5:45 pmLambert-St Louis
22h 39m
1 stop
PIT5:24 pmPittsburgh
Frontier
May 9
PIT6:14 pmPittsburgh
7h 00m
1 stop
STL12:14 amLambert-St Louis
May 11
STL5:45 pmLambert-St Louis
22h 39m
1 stop
PIT5:24 pmPittsburgh
Frontier
Jun 2
PIT6:50 pmPittsburgh
5h 59m
1 stop
STL11:49 pmLambert-St Louis
Jun 7
STL5:35 pmLambert-St Louis
23h 25m
1 stop
PIT6:00 pmPittsburgh

See travel insights to St. Louis from

How to get the cheapest flight ticket from Pittsburgh to St. Louis

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 St. Louis?

In general, April is the cheapest month to fly from Pittsburgh to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $275. The month of May is another great option to travel to St. Louis, with average flight prices from Pittsburgh averaging around $291.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $384. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $456. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Pittsburgh in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $356 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $425 per ticket.

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

Fly from Pittsburgh to Lambert-St Louis for the best Pittsburgh - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Pittsburgh when booking 22 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $350 when searching 22 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Pittsburgh for as low as $260 on momondo.

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

There are 1 cabin classes available to choose from on Pittsburgh to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Pittsburgh to St. Louis flight prices changed over time?

As of April 2025, prices for Pittsburgh to St. Louis flights are approximately 8% more expensive when compared to flights at the same time last year.

When to book flights from Pittsburgh to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Pittsburgh to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Pittsburgh to St. Louis (PIT to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Pittsburgh to St. Louis

Best Price Found

$80

Fastest flight time

1h 45m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Pittsburgh in the past 72 hours is $80. The best round-trip flight deal from Pittsburgh to St. Louis found on momondo in the last 72 hours is $171.
The fastest flight from Pittsburgh to St. Louis takes 1h 45m
Direct flights go from Pittsburgh to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

  • How far is Pittsburgh to Lambert-St Louis by plane?

    The straight-line distance from Pittsburgh to Lambert-St Louis is 557.2 mi. Flights usually cover this in 1h 45m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Pittsburgh Airport to Lambert-St Louis Airport?

    Prices for flights from Pittsburgh Airport to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from Pittsburgh Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Pittsburgh Airport to Lambert-St Louis Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Pittsburgh Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport 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 Lambert-St Louis Airport. 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 Pittsburgh to St. Louis?

  • What is the most popular airline from Pittsburgh to St. Louis?


Best airlines flying from Pittsburgh to St. Louis

Compare and see reviews for airlines that fly from Pittsburgh to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $169Free CancellationRating
6.3
7,940 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $221Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $245Free CancellationRating
8.0
4,287 reviews
Search Southwest flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
8,685 reviews
Search United Airlines flights
DeltaPriceFrom $258Free CancellationRating
8.0
7,920 reviews
Search Delta flights
  • Southwest Flights From Pittsburgh to St. Louis

    The lowest priced Southwest flight from Pittsburgh to St. Louis from the last 72 hours was $245. Generally, Southwest has 5 flights on this route every week with an average price of $351. Southwest is rated 8.0/10 by our users.


Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Florissant
Maryland Heights
Hermann
Fairview Heights
Collinsville
Fenton
Farmington
O'Fallon
St. Peters
Wentzville
Alton
Glencoe
Eureka
Edwardsville
Festus
Clayton
Grafton
Litchfield

Why use momondo?

Why should I use momondo to find a flight deal from Pittsburgh to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Pittsburgh to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Pittsburgh to St. Louis with flexible booking policies on momondo?

Flights from Pittsburgh to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Pittsburgh to St. Louis?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Pittsburgh.

I’m not ready to book a flight from Pittsburgh to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Pittsburgh to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.


An easier way to manage your St. Louis 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?
Mon 4/28
Mon 5/5

Find better results for your trip to the United States