$66 Cheap Flights from St. Louis (STL) to Harrisburg (MDT)

View $66 flight on Sat, Jan 24, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Harrisburg Intl. Airport (MDT)

Cheap Flights from St. Louis to Harrisburg (STL-MDT)

Prices were available within the past 7 days and start at $66 for one-way flights and $210 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Jan 29 - Thu, Feb 19
STL
St. Louis
MDT
Harrisburg
$210 Roundtrip, found 4 days ago
$210
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Jan 29 from St. Louis to Harrisburg, returning Thu, Feb 19, priced at $210 found 4 days ago
Frontier Airlines
Sat, Jan 31 - Thu, Feb 19
STL
St. Louis
MDT
Harrisburg
$230 Roundtrip, found 4 days ago
$230
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sat, Jan 31 from St. Louis to Harrisburg, returning Thu, Feb 19, priced at $230 found 4 days ago
American Airlines
Thu, Dec 18 - Sat, Jan 3
STL
St. Louis
MDT
Harrisburg
$249 Roundtrip, found 7 hours ago
$249
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Thu, Dec 18 from St. Louis to Harrisburg, returning Sat, Jan 3, priced at $249 found 7 hours ago
Delta
Fri, Dec 5 - Sun, Dec 21
STL
St. Louis
MDT
Harrisburg
$249 Roundtrip, just found
$249
Roundtrip
just found
Select Delta flight, departing Fri, Dec 5 from St. Louis to Harrisburg, returning Sun, Dec 21, priced at $249 just found
United
Fri, Dec 26 - Tue, Dec 30
STL
St. Louis
MDT
Harrisburg
$249 Roundtrip, found 14 hours ago
$249
Roundtrip
found 14 hours ago
Select United flight, departing Fri, Dec 26 from St. Louis to Harrisburg, returning Tue, Dec 30, priced at $249 found 14 hours ago
Delta
Mon, Nov 24 - Thu, Dec 4
STL
St. Louis
MDT
Harrisburg
$250 Roundtrip, found 1 day ago
$250
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Nov 24 from St. Louis to Harrisburg, returning Thu, Dec 4, priced at $250 found 1 day ago
Delta
Mon, Nov 24 - Thu, Nov 27
STL
St. Louis
MDT
Harrisburg
$251 Roundtrip, found 1 day ago
$251
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Nov 24 from St. Louis to Harrisburg, returning Thu, Nov 27, priced at $251 found 1 day ago
United
Fri, Apr 3 - Sun, Apr 5
STL
St. Louis
MDT
Harrisburg
$255 Roundtrip, found 1 day ago
$255
Roundtrip
found 1 day ago
Select United flight, departing Fri, Apr 3 from St. Louis to Harrisburg, returning Sun, Apr 5, priced at $255 found 1 day ago
United
Fri, Apr 3 - Sun, Apr 5
STL
St. Louis
MDT
Harrisburg
$257 Roundtrip, found 1 day ago
$257
Roundtrip
found 1 day ago
Select United flight, departing Fri, Apr 3 from St. Louis to Harrisburg, returning Sun, Apr 5, priced at $257 found 1 day ago
United
Sat, Dec 6 - Tue, Dec 9
STL
St. Louis
MDT
Harrisburg
$259 Roundtrip, found 5 days ago
$259
Roundtrip
found 5 days ago
Select United flight, departing Sat, Dec 6 from St. Louis to Harrisburg, returning Tue, Dec 9, priced at $259 found 5 days ago

Find the cheapest month to fly from St. Louis (STL) to Harrisburg (MDT)

February is typically the cheapest month to fly

From $185 - $824 per traveler.

Alternative airports near Harrisburg

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lancaster, PA LNS. Average driving time to city center is 48 minutes. Flights from $516
LNS
Lancaster, PA
Average driving time to city center48 min
Flights from $516

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT) cost?
Get a cheap one-way flight from $66 or cheap return flight from $210 from Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT)?
January is the cheapest month to fly from STL to MDT. Timing your trip outside of the busy season is often the key to landing a great deal.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from STL to MDT. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to MDT?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT) route, fly before 3 PM. Later departures are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT) last-minute?
Booking your ticket from STL to MDT right before your journey is typically more expensive. However, if there's some wiggle room with your travel times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a STL to MDT flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to MDT flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place will take the stress out of travel planning. Simply secure your flights and select from our wide range of stays, then customize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Harrisburg Intl. Airport (MDT)?
In most instances, you can cancel or modify your STL to MDT flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like more details, visit our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Harrisburg Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$210
Distance
732 mi

Book with confidence

St. Louis to Harrisburg Flights

The cheapest times to fly from St. Louis to Harrisburg

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Harrisburg are during the month of January. You can find some of the cheapest flights from St. Louis to Harrisburg with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Harrisburg

Sunday is one of the best days to book for cheap flights from St. Louis to Harrisburg: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Harrisburg

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Harrisburg in 2025. You can also book with separate airlines for your outbound and return journeys, from $66 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Harrisburg flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Harrisburg airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Harrisburg Flights

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*Available to One Key members.