Cheap flights from Pittsburgh to St. Louis from $91
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 9/3. 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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American Airlines flights from Pittsburgh to St. Louis
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Southwest flights from Pittsburgh to St. Louis
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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 $258. The month of May is another great option to travel to St. Louis, with average flight prices from Pittsburgh averaging around $297.
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 $381. 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 $446. 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 at noon is the least expensive time of day to depart. momondo users have found prices as low as $360 when looking at flights departing at noon. 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 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $344 when searching 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 $257 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.
Can stopping save me money on Pittsburgh to St. Louis flights?
No. A direct flight is the cheapest option for a flight between Pittsburgh to St. Louis.
How have Pittsburgh to St. Louis flight prices changed over time?
As of July 2025, prices for Pittsburgh to St. Louis flights are approximately 53% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Pittsburgh to Lambert-St Louis?
American Airlines, Southwest, and Spirit Airlines are the most popular carriers operating from Pittsburgh to Lambert-St Louis
What airlines fly to St. Louis?
Southwest, American Airlines and Delta are the top three most popular airlines that fly to St. Louis from Pittsburgh according to our data. Southwest is the first choice among our users, with 50% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
How many flights depart from Pittsburgh to St. Louis on average per week?
As of July 2025, there are 4 flights per week flying from Pittsburgh to St. Louis. The most common day of the week flights depart is Mon, with 25% of flights taking off on this day.
When to book flights from Pittsburgh to St. Louis
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 | $91 |
|---|---|
Fastest flight time | 1h 45m |
Direct flights | Mon, Tue, Thu, Fri, Sat and Sun |
Airports in St. Louis | 1 airport |
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?
As of July 2025, there are 4 operators available to choose from 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?
momondo data reveals that the most frequently booked plane model on the route from Pittsburgh to St. Louis is Boeing 737 MAX 8, representing 25.45% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 20.91%, Boeing 737-700 Passenger/BBJ1 (winglets) at 9.09%, and Boeing 737-800 at 8.18%.
What is the most popular airline from Pittsburgh to St. Louis?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Pittsburgh to St. Louis is Southwest (50% of total bookings). The next most popular airlines are American Airlines (25%), Delta (14%), and United Airlines (11%).
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 | ||
|---|---|---|---|---|---|
| PriceFrom $221 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $245 | Free Cancellation | Rating 8.0 4,275 reviews | |||
| PriceFrom $258 | Free Cancellation | Rating 8.0 7,974 reviews | |||
| PriceFrom $258 | Free Cancellation | Rating 7.4 8,858 reviews |
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 4 flights on this route every week with an average price of $344. 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 locationsWhy 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.