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Cheap flights from St. Louis to Harrisburg from $212

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 12/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Harrisburg

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
10:00 am - 5:25 pmSTL-MDT
6h 25m1 stop
Delta Logo
6:10 am - 9:44 amMDT-STL
4h 34m1 stop
$249Delta
Find Deal
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
6:00 am - 10:57 amSTL-MDT
3h 57m1 stop
American Airlines Logo
6:53 am - 1:13 pmMDT-STL
7h 20m2 stops
$254American Airlines
Find Deal
Thu, Oct 30 - Tue, Nov 4
Delta Logo
6:40 am - 11:53 amSTL-MDT
4h 13m1 stop
Delta Logo
6:10 am - 9:37 amMDT-STL
4h 27m1 stop
$259Delta
Find Deal
Wed, Oct 15 - Sat, Oct 18
American Airlines Logo
6:53 pm - 12:18 amSTL-MDT
4h 25m1 stop
American Airlines Logo
5:09 am - 8:35 amMDT-STL
4h 26m1 stop
$274American Airlines
Find Deal
Thu, Dec 11 - Fri, Jan 2
American Airlines Logo
6:00 am - 11:10 amSTL-MDT
4h 10m1 stop
American Airlines Logo
5:00 am - 8:27 amMDT-STL
4h 27m1 stop
$279American Airlines
Find Deal
Wed, Oct 15 - Fri, Nov 21
United Airlines Logo
11:10 am - 4:52 pmSTL-MDT
4h 42m1 stop
United Airlines Logo
6:30 am - 10:49 amMDT-STL
5h 19m1 stop
$329United Airlines
Find Deal
Wed, Oct 15 - Sun, Oct 19
American Airlines Logo
5:30 am - 1:17 pmSTL-MDT
6h 47m1 stop
American Airlines Logo
7:30 am - 2:20 pmMDT-STL
7h 50m1 stop
$374American Airlines
Find Deal
Fri, Dec 19 - Mon, Dec 22
American Airlines Logo
6:00 am - 4:35 pmSTL-MDT
9h 35m1 stop
American Airlines Logo
4:47 pm - 11:12 pmMDT-STL
7h 25m1 stop
$410American Airlines
Find Deal
Mon, Jan 12 - Thu, Jan 15
United Airlines Logo
1:00 pm - 9:09 pmSTL-MDT
7h 09m1 stop
United Airlines Logo
6:15 am - 10:58 pmMDT-STL
17h 43m2 stops
$412United Airlines
Find Deal
Wed, Dec 10 - Wed, Jan 7
American Airlines Logo
4:49 pm - 11:41 pmSTL-MDT
5h 52m1 stop
American Airlines Logo
11:49 am - 4:19 pmMDT-STL
5h 30m1 stop
$427American Airlines
Find Deal
Fri, Dec 12 - Mon, Dec 15

Delta flights from St. Louis to Harrisburg

Our best Delta deals on St. Louis to Harrisburg flight tickets
Delta
Feb 18
STL10:00 amLambert-St Louis
6h 25m
1 stop
MDT5:25 pmHarrisburg
Feb 21
MDT6:10 amHarrisburg
4h 34m
1 stop
STL9:44 amLambert-St Louis
$249
Find similar
Delta
Oct 15
STL6:40 amLambert-St Louis
4h 13m
1 stop
MDT11:53 amHarrisburg
Oct 18
MDT6:10 amHarrisburg
4h 27m
1 stop
STL9:37 amLambert-St Louis
$259
Find similar
Delta
Oct 2
STL6:01 amLambert-St Louis
3h 57m
1 stop
MDT10:58 amHarrisburg
Oct 4
MDT12:28 pmHarrisburg
5h 14m
1 stop
STL4:42 pmLambert-St Louis
$328
Find similar

American Airlines flights from St. Louis to Harrisburg

Our best American Airlines deals on St. Louis to Harrisburg flight tickets
American Airlines
Oct 30
STL6:00 amLambert-St Louis
3h 57m
1 stop
MDT10:57 amHarrisburg
Nov 4
MDT6:53 amHarrisburg
7h 20m
2 stops
STL1:13 pmLambert-St Louis
$254
Find similar
American Airlines
Dec 11
STL6:53 pmLambert-St Louis
4h 25m
1 stop
MDT12:18 amHarrisburg
Jan 2
MDT5:09 amHarrisburg
4h 26m
1 stop
STL8:35 amLambert-St Louis
$274
Find similar
American Airlines
Oct 15
STL6:00 amLambert-St Louis
4h 10m
1 stop
MDT11:10 amHarrisburg
Nov 21
MDT5:00 amHarrisburg
4h 27m
1 stop
STL8:27 amLambert-St Louis
$279
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Harrisburg that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 1, 2025.
Use the filters below to find and compare flights from St. Louis to Harrisburg that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 2/18

10:00 am-5:25 pm

1 stop6h 25m

Harrisburg

Sat 2/21

6:10 am-9:44 am

1 stop4h 34m

$249

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 10/30

6:00 am-10:57 am

1 stop3h 57m

Harrisburg

Tue 11/4

6:53 am-1:13 pm

2 stops7h 20m

$254

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 10/15

6:40 am-11:53 am

1 stop4h 13m

Harrisburg

Sat 10/18

6:10 am-9:37 am

1 stop4h 27m

$259

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 12/11

6:53 pm-12:18 am

1 stop4h 25m

Harrisburg

Fri 1/2

5:09 am-8:35 am

1 stop4h 26m

$274

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 10/15

6:00 am-11:10 am

1 stop4h 10m

Harrisburg

Fri 11/21

5:00 am-8:27 am

1 stop4h 27m

$279

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 10/15

11:10 am-4:52 pm

1 stop4h 42m

Harrisburg

Sun 10/19

6:30 am-10:49 am

1 stop5h 19m

$329

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 12/19

5:30 am-1:17 pm

1 stop6h 47m

Harrisburg

Mon 12/22

7:30 am-2:20 pm

1 stop7h 50m

$374

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Mon 1/12

6:00 am-4:35 pm

1 stop9h 35m

Harrisburg

Thu 1/15

4:47 pm-11:12 pm

1 stop7h 25m

$410

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 12/10

1:00 pm-9:09 pm

1 stop7h 09m

Harrisburg

Wed 1/7

6:15 am-10:58 pm

2 stops17h 43m

$412

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 12/12

4:49 pm-11:41 pm

1 stop5h 52m

Harrisburg

Mon 12/15

11:49 am-4:19 pm

1 stop5h 30m

$427

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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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 July is, on average, the cheapest month to fly to Harrisburg from St. Louis, with most prices found around $279. If you aren’t able to travel to Harrisburg during the month of July, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $293.

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 October 2025, prices for St. Louis to Harrisburg flights are approximately 15% 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

Direct flights

None
There are no direct flights from St. Louis to Harrisburg. There are no popular flight routes from St. Louis to Harrisburg.
Search flight deals

  • 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 3h 57m 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 $242Free CancellationRating
7.9
7,961 reviews
Search Delta flights
United AirlinesPriceFrom $248Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
American AirlinesPriceFrom $248Free CancellationRating
7.2
10,000 reviews
Search American 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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