Cheap flights from St. Louis to Pittsburgh 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 St. Louis to Pittsburgh departing on 9/23. 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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How to get the cheapest flight ticket from St. Louis to Pittsburgh
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 Pittsburgh?
In general, August is the cheapest month to fly from St. Louis to Pittsburgh. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $283. The month of May is another great option to travel to Pittsburgh, with average flight prices from St. Louis averaging around $294.
What is the cheapest day to depart on your flight to Pittsburgh?
The cheapest day to depart on your flight to Pittsburgh is on a Wednesday when prices can be found for as low as $324. This is often the case because there is less demand to fly during this day of the week. Flights from St. Louis to Pittsburgh on a Sunday will generally be more expensive and average around $479. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Pittsburgh?
Our data shows that the cheapest St. Louis to Pittsburgh flights are usually those with departure times in the afternoon. Our users have found flights to Pittsburgh in the afternoon for as low as $313. Flights to Pittsburgh are more costly at noon, with an average ticket price of $381. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Lambert-St Louis to Pittsburgh flight route?
Fly from Lambert-St Louis to Pittsburgh for the best Lambert-St Louis - Pittsburgh flight prices
How far in advance should I book a flight to Pittsburgh?
You are more likely to see cheaper flights to Pittsburgh from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Pittsburgh for around $357 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Pittsburgh from St. Louis for as low as $175 on momondo.
What cabin class options are available on Lambert-St Louis to Pittsburgh flights?
There are 1 cabin classes available to choose from on Lambert-St Louis to Pittsburgh 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 St. Louis to Pittsburgh flights?
No. A direct flight is the cheapest option for a flight between St. Louis to Pittsburgh.
How have St. Louis to Pittsburgh flight prices changed over time?
As of June 2025, prices for St. Louis to Pittsburgh flights are approximately 48% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Lambert-St Louis to Pittsburgh?
American Airlines, Southwest, and Delta are the most popular carriers operating from Lambert-St Louis to Pittsburgh
What airlines fly to Pittsburgh?
Southwest, American Airlines and Delta are the top three most popular airlines that fly to Pittsburgh from St. Louis according to our data. Southwest is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Pittsburgh. Keep in mind that there are 4 different airlines that fly to Pittsburgh on a routine basis, so you have a few additional options to choose from.
How many flights depart from St. Louis to Pittsburgh on average per week?
The number of flights available between St. Louis and Pittsburgh is 6 per week as of June 2025. The most frequent departure day is Sun, with 33% of weekly flights leaving on this day.
When to book flights from St. Louis to Pittsburgh
Cheap St. Louis to Pittsburgh (STL to PIT) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Pittsburgh
How far is Lambert-St Louis to Pittsburgh by plane?
The distance between Lambert-St Louis and Pittsburgh is about 557.2 mi. Typically, this will take 1h 35m by plane in normal conditions.
When did momondo last update prices for flights from Lambert-St Louis Airport to Pittsburgh Airport?
Prices for flights from Lambert-St Louis Airport to Pittsburgh Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Pittsburgh Airport?
The number of operators available for flights from Lambert-St Louis Airport to Pittsburgh Airport is 4 as of June 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Pittsburgh Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Pittsburgh Airport.
What documentation or ID do you need to fly to Pittsburgh Airport?
The travel and health documents you'll need for your trip to Pittsburgh 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 Pittsburgh 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 St. Louis to Pittsburgh?
Based on momondo bookings for flights between St. Louis and Pittsburgh, the leading plane model is Boeing 737-700 Passenger/BBJ1 (winglets), making up 28.95% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 18.42%, Embraer 175 with 13.16%, and Boeing 737 MAX 8 with 7.89%.
What is the most popular airline from St. Louis to Pittsburgh?
Based on momondo bookings for flights between St. Louis and Pittsburgh, the leading airline is Southwest, making up 51% of the total bookings. Other popular airlines include American Airlines with 25%, Delta with 18%, and United Airlines with 6%.
Best airlines flying from St. Louis to Pittsburgh
Compare and see reviews for airlines that fly from St. Louis to Pittsburgh with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $249 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $252 | Free Cancellation | Rating 8.0 7,969 reviews | |||
| PriceFrom $258 | Free Cancellation | Rating 7.4 8,852 reviews | |||
| PriceFrom $273 | Free Cancellation | Rating 8.0 4,278 reviews |
Southwest Flights From St. Louis to Pittsburgh
Southwest flight deals from St. Louis to Pittsburgh start from $273 round-trip. Over the 6 Southwest flights for this route in a normal week, average airfare is usually $368 round-trip - but some users have found much cheaper deals with momondo.
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Why should I use momondo to find a flight deal from St. Louis to Pittsburgh?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Pittsburgh. momondo saves you time and could save you money on your trip.
Can I find flights from St. Louis to Pittsburgh with flexible booking policies on momondo?
Flights from St. Louis to Pittsburgh 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 St. Louis to Pittsburgh?
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 Pittsburgh from St. Louis.
I’m not ready to book a flight from St. Louis to Pittsburgh right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Pittsburgh, momondo offers a useful price alert feature which will track prices for flights to Pittsburgh from St. Louis and alert you when they change.