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Cheap flights from St. Louis to Harrisburg from $159

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 Harrisburg departing on 5/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Harrisburg

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to Harrisburg.
4:57 pm - 4:50 pmSTL-MDT
22h 53m1 stop
3:56 pm - 11:46 pmMDT-STL
8h 50m1 stop
$240Frontier
Find Deal
Thu, Apr 10 - Mon, Apr 14
3:43 pm - 9:26 pmSTL-MDT
4h 43m1 stop
8:10 am - 2:47 pmMDT-STL
7h 37m1 stop
$249United Airlines
Find Deal
Tue, May 13 - Tue, May 20
7:05 am - 4:07 pmSTL-MDT
8h 02m2 stops
5:58 pm - 11:38 pmMDT-STL
6h 40m1 stop
$254Delta
Find Deal
Tue, May 13 - Tue, May 20
5:32 pm - 11:46 pmSTL-MDT
5h 14m1 stop
6:05 am - 11:45 amMDT-STL
6h 40m1 stop
$279Delta
Find Deal
Thu, Apr 24 - Sun, Apr 27
1:09 pm - 10:43 pmSTL-MDT
8h 34m2 stops
5:58 pm - 11:38 pmMDT-STL
6h 40m1 stop
$299Delta
Find Deal
Tue, May 13 - Tue, May 20
1:12 pm - 6:35 pmSTL-MDT
4h 23m1 stop
6:05 am - 9:58 amMDT-STL
4h 53m1 stop
$329United Airlines
Find Deal
Fri, Apr 11 - Tue, Apr 15
6:10 pm - 5:24 pmSTL-MDT
22h 14m1 stop
10:01 am - 6:41 pmMDT-STL
33h 40m3 stops
Thu, Apr 24 - Sun, Apr 27
4:05 pm - 11:46 pmSTL-MDT
6h 41m1 stop
6:05 am - 1:01 pmMDT-STL
7h 56m2 stops
$359Delta
Find Deal
Thu, Apr 24 - Sun, Apr 27
6:00 am - 4:07 pmSTL-MDT
9h 07m2 stops
6:00 am - 1:19 pmMDT-STL
8h 19m2 stops
$403Delta
Find Deal
Tue, May 13 - Tue, May 20
6:00 am - 4:08 pmSTL-MDT
9h 08m2 stops
6:19 pm - 11:36 pmMDT-STL
6h 17m1 stop
$409Delta
Find Deal
Thu, Apr 10 - Mon, Apr 14

United Airlines flights from St. Louis to Harrisburg

Our best United Airlines deals on St. Louis to Harrisburg flight tickets
United Airlines
May 13
STL3:43 pmLambert-St Louis
4h 43m
1 stop
MDT9:26 pmHarrisburg
May 20
MDT8:10 amHarrisburg
7h 37m
1 stop
STL2:47 pmLambert-St Louis
United Airlines
Apr 11
STL1:12 pmLambert-St Louis
4h 23m
1 stop
MDT6:35 pmHarrisburg
Apr 15
MDT6:05 amHarrisburg
4h 53m
1 stop
STL9:58 amLambert-St Louis
United Airlines
Apr 10
STL3:40 pmLambert-St Louis
5h 55m
1 stop
MDT10:35 pmHarrisburg
Apr 14
MDT8:15 amHarrisburg
7h 27m
1 stop
STL2:42 pmLambert-St Louis

Delta flights from St. Louis to Harrisburg

Our best Delta deals on St. Louis to Harrisburg flight tickets
Delta
May 13
STL7:05 amLambert-St Louis
8h 02m
2 stops
MDT4:07 pmHarrisburg
May 20
MDT5:58 pmHarrisburg
6h 40m
1 stop
STL11:38 pmLambert-St Louis
Delta
Apr 24
STL5:32 pmLambert-St Louis
5h 14m
1 stop
MDT11:46 pmHarrisburg
Apr 27
MDT6:05 amHarrisburg
6h 40m
1 stop
STL11:45 amLambert-St Louis
Delta
May 13
STL1:09 pmLambert-St Louis
8h 34m
2 stops
MDT10:43 pmHarrisburg
May 20
MDT5:58 pmHarrisburg
6h 40m
1 stop
STL11:38 pmLambert-St Louis

See travel insights to Harrisburg from

How to get the cheapest flight ticket from St. Louis to Harrisburg

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 Harrisburg?

The month of September is, on average, the cheapest month to fly to Harrisburg from St. Louis, with most prices found around $288. If you aren’t able to travel to Harrisburg during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $303.

What is the cheapest day to depart on your flight to Harrisburg?

The cheapest day to depart from St. Louis to Harrisburg is on a Thursday. Travelers who choose to depart for Harrisburg on a Thursday will often find tickets for as low as $298. On the other hand, Sunday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $413.

What is the cheapest time of day to depart on your flight to Harrisburg?

Our data shows that the cheapest St. Louis to Harrisburg flights are usually those with departure times in the morning. Our users have found flights to Harrisburg in the morning for as low as $316. Try not to purchase tickets at noon because they tend to be around $387. Of course, these prices can vary depending on the time of year and what airport you fly to.

How have St. Louis to Harrisburg flight prices changed over time?

As of March 2025, prices for St. Louis to Harrisburg flights are approximately 29% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Harrisburg

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Harrisburg according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Harrisburg (STL to MDT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Harrisburg

Best Price Found

$159

Fastest flight time

4h 18m

Direct flights

None

Airports in Harrisburg

1 airport
The best one-way flight to Harrisburg from St. Louis in the past 72 hours is $159. The best round-trip flight deal from St. Louis to Harrisburg found on momondo in the last 72 hours is $240.
The fastest flight from St. Louis to Harrisburg takes 4h 18m
There are no direct flights from St. Louis to Harrisburg. Popular non-direct route for this connection is Lambert-St Louis Airport - Harrisburg Airport.
There is 1 airport near Harrisburg: Harrisburg (MDT)

  • How far is Lambert-St Louis to Harrisburg by plane?

    The straight-line distance from Lambert-St Louis to Harrisburg is 718.1 mi. Typically, this will take 4h 23m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Harrisburg Airport?

    Prices for flights from Lambert-St Louis Airport to Harrisburg Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Harrisburg Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Harrisburg Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Harrisburg Airport.

  • What documentation or ID do you need to fly to Harrisburg Airport?

    The travel and health documents you'll need for your trip to Harrisburg 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 Harrisburg Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Harrisburg?


Best airlines flying from St. Louis to Harrisburg

Compare and see reviews for airlines that fly from St. Louis to Harrisburg with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $211Free CancellationRating
8.0
7,895 reviews
Search Delta flights
American AirlinesPriceFrom $248Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $251Free CancellationRating
7.4
8,603 reviews
Search United Airlines flights

Traveling to a place near Harrisburg?

Book flights to Harrisburg if you plan to visit one of these locations
Hershey
Carlisle
Mechanicsburg
Camp Hill
Hummelstown

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Harrisburg?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Harrisburg. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Harrisburg with flexible booking policies on momondo?

Yes. All flights to Harrisburg from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Harrisburg?

Once all potential St. Louis to Harrisburg flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Harrisburg right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Harrisburg now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Harrisburg and let you know when they change.


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