$97 Find Cheap Flights from St. Louis to Pittsburgh - Compare and Save

Among airlines operating St. Louis to Pittsburgh flights:

• Southwest: offers free seat selection

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

Only Southwest operates flights between St. Louis and Pittsburgh.

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

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

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

Only Economy Class is available on flights from St. Louis to Pittsburgh.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $308 round-trip via Nashville Intl (BNA), compared to $350 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. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

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

• Chicago O'Hare Intl (ORD) - 43% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 13% of one-stop connections
• Nashville Intl (BNA) - 13% of one-stop connections
• Chicago Midway (MDW) - 13% of one-stop connections

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

On the St. Louis to Pittsburgh route, being flexible with your departure day can save you up to 38%. Saturday is the cheapest day at $275 round-trip on average, while Monday is the most expensive at $443: a $168 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

Morning is the busiest departure period on St. Louis to Pittsburgh 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 Pittsburgh are PNC Ballpark, David L Lawrence Convention Center and PPG Paints Arena. These are among the most viewed places in Pittsburgh on KAYAK.

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

• Earliest: departs at 9:45 am and lands at 11:22 am
• Latest: departs at 8:50 pm and lands at 10:27 pm.

The flight takes about 1h 37m.

A nonstop flight from St. Louis to Pittsburgh takes 1h 37m, 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 $227 to $973. That means the highest observed fare was about 4x higher than the lowest one.

One-way fares from St. Louis to Pittsburgh are currently lower than usual. Average one-way flight prices are about $118, which is 45% below the typical average for this route.

Flying via Nashville Intl (BNA) gives the shortest average 1-stop total travel time at 3h 50m, compared with 3h 53m via Detroit Metropolitan Wayne County (DTW) and 4h 13m via Chicago Midway (MDW).

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

Pittsburgh Airport (PIT) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
· Dollar
· Hertz
· Sixt
· Budget
· Alamo

Round-trip flights from St. Louis to Pittsburgh range from $280 to $446, with an average of $350 over the past 12 months. Anything below $280 counts as a good deal.