$104 Find Cheap Flights from Pittsburgh to St. Louis - Compare and Save

Among airlines operating Pittsburgh to St. Louis flights:

• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only Southwest operates flights between Pittsburgh and St. Louis.

Flights from Pittsburgh to St. Louis usually depart from Pittsburgh (PIT) and arrive at Lambert-St Louis (STL).

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag and a checked bag in Economy Class
• JetBlue: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Two cabin classes are available on flights from Pittsburgh to St. Louis:

• Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $256 round-trip via Nashville Intl (BNA), compared to $366 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 MAX 8 family is used most often on this route, operated mainly by Southwest and United Airlines. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

One-stop flights from Pittsburgh to St. Louis most commonly connect through:

• Chicago O'Hare Intl (ORD) - 56% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 15% of one-stop connections
• Chicago Midway (MDW) - 9% of one-stop connections
• Charlotte Douglas (CLT) - 7% of one-stop connections

Chicago O'Hare Intl (ORD) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 49% on the Pittsburgh to St. Louis route. Wednesday is the cheapest departure day at $306 round-trip on average, while Sunday is the most expensive at $590, a difference of $284. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on Pittsburgh to St. Louis flights, with 50% of flights leaving in that window. Evening departures account for 50%, afternoon flights for 0%, and night flights for 0%.

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

These are the earliest and latest flight times available from Pittsburgh to St. Louis:

• Earliest: departs at 5:55 am and lands at 7:44 am
• Latest: departs at 9:20 pm and lands at 11:09 pm.

The flight takes about 1h 49m.

Last-minute fares on this route - booked within 2 weeks of departure - run 58% above the route average of $370. Book 25 weeks before departure for the lowest fares.

A nonstop flight from Pittsburgh to St. Louis takes 1h 49m, covering 552 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $190 to $1,273. That means the highest observed fare was about 7x higher than the lowest one.

One-way fares from Pittsburgh to St. Louis are currently lower than usual. Average one-way flight prices are about $116, which is 45% below the typical average for this route.

Flying via Chicago Midway (MDW) gives the shortest average 1-stop total travel time at 3h 56m, compared with 3h 58m via Detroit Metropolitan Wayne County (DTW) and 3h 59m via Nashville Intl (BNA).

St. Louis is 1 hour behind Pittsburgh (Central Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Round-trip flights from Pittsburgh to St. Louis range from $281 to $455, with an average of $370 over the past 12 months. Anything below $281 counts as a good deal.

JetBlue is the only airline on the Pittsburgh to St. Louis route offering in-flight Wi-Fi. Pricing depends on fare class.