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Harrisburg

$150+ Cheap flights from St. Louis to Harrisburg (STL - MDT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MDT
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from St. Louis to Harrisburg

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Harrisburg (MDT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 17, 2025.

Round-trip from

$249
(Delta)

One-way from

$150
(Booking.com)

Popular in

April

Cheapest in

October

Average price

$303
From Lambert-St Louis to Harrisburg
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One-way flight from Lambert-St Louis to Harrisburg
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Highest demand for flights based on searches. 13% potential increase in price ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from St. Louis to Harrisburg

Cheapest flights from St. Louis to Harrisburg
Explore the most affordable flight options available from St. Louis to Harrisburg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:44 amSTL - MDT
1 stop5h 25mDelta
Mon 11/2412:41 pmMDT - STL
1 stop5h 28mDelta
Deal found 9/15$249
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/43:55 pmSTL - MDT
1 stop6h 51mDelta
Mon 10/66:25 pmMDT - STL
1 stop6h 16mDelta
Deal found 9/16$259
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/75:56 pmSTL - MDT
1 stop4h 57mAmerican Airlines
Sun 11/95:00 amMDT - STL
1 stop4h 27mAmerican Airlines
Deal found 9/16$274
This Frontier deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/210:49 amSTL - MDT
2 stops22h 23mFrontier
Mon 10/610:57 amMDT - STL
1 stop10h 40mFrontier
Deal found 9/17$316
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/128:13 amSTL - MDT
1 stop6h 17mAmerican Airlines
Sun 12/148:05 pmMDT - STL
1 stop4h 53mAmerican Airlines
Deal found 9/16$339
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/103:59 pmSTL - MDT
1 stop6h 09mDelta
Mon 10/136:25 pmMDT - STL
1 stop6h 16mDelta
Deal found 9/16$344
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:00 amSTL - MDT
1 stop4h 14mUnited Airlines
Wed 10/296:15 amMDT - STL
2 stops12h 24mUnited Airlines
Deal found 9/17$377
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/209:00 amSTL - MDT
2 stops23h 35mUnited Airlines
Mon 11/2410:47 amMDT - STL
1 stop5h 59mUnited Airlines
Deal found 9/15$450
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/124:30 pmSTL - MDT
2 stops27h 39mUnited Airlines
Sun 12/146:30 amMDT - STL
1 stop5h 16mUnited Airlines
Deal found 9/16$457
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1411:10 amSTL - MDT
1 stop4h 42mUnited Airlines
Thu 10/166:30 amMDT - STL
1 stop5h 19mUnited Airlines
Deal found 9/16$475

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from St. Louis to Harrisburg that are best for you.

Fly from

St. Louis

Fly to

Harrisburg

Route

Depart

Return

Price

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 11/19

11:44 am-6:09 pm

1 stop5h 25m

Harrisburg

Mon 11/24

12:41 pm-5:09 pm

1 stop5h 28m

$249

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 11/20

5:00 am-10:54 am

1 stop4h 54m

Harrisburg

Mon 11/24

6:48 am-2:20 pm

1 stop8h 32m

$249

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 10/22

6:40 am-11:53 am

1 stop4h 13m

Harrisburg

Wed 10/29

11:44 am-3:55 pm

1 stop5h 11m

$249

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 11/19

6:52 am-12:25 pm

1 stop4h 33m

Harrisburg

Mon 11/24

7:23 pm-11:04 pm

1 stop4h 41m

$249

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

Sat 10/4

3:55 pm-11:46 pm

1 stop6h 51m

Harrisburg

Mon 10/6

6:25 pm-11:41 pm

1 stop6h 16m

$259

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 10/2

10:49 am-10:12 am

2 stops22h 23m

Harrisburg

Mon 10/6

10:57 am-8:37 pm

1 stop10h 40m

$316

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 10/10

3:59 pm-11:08 pm

1 stop6h 09m

Harrisburg

Mon 10/13

6:25 pm-11:41 pm

1 stop6h 16m

$344

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 10/22

5:00 am-10:14 am

1 stop4h 14m

Harrisburg

Wed 10/29

6:15 am-5:39 pm

2 stops12h 24m

$377

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sun 10/26

1:41 pm-5:36 pm

1 stop26h 55m

$150

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 17 results
1
2

Best time to book a flight from St. Louis to Harrisburg

Have a flexible travel schedule? Discover the best time to fly to Harrisburg from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Harrisburg

What is the cheapest month to book a flight from St. Louis to Harrisburg?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $347). Flying from St. Louis to Harrisburg in November is currently the most expensive (average of $408). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Harrisburg

Get insights into the airlines that provide service to Harrisburg. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Harrisburg. Reviews last updated September 17, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from St. Louis to Harrisburg have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Harrisburg. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Harrisburg?

    There are many flights that can get you from St. Louis to Harrisburg in 4h 54m. Fly via Delta or American Airlines to get the fastest option. The distance between St. Louis and Harrisburg is about 731 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from St. Louis to Harrisburg round-trip?

    Flying on Delta is currently your cheapest option to Harrisburg, with prices starting at $211. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $248 and $248, respectively. Delta is priced at 39% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Harrisburg one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $150. Users have also found prices from $237 and $247 on American Airlines and United Airlines, respectively.

  • Can I find deals for flights from St. Louis to Harrisburg that include hotel bookings?

    Yes. In addition to deals on St. Louis to Harrisburg flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Harrisburg?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Harrisburg.

  • Can I find deals for business class flights from St. Louis to Harrisburg?

    Yes. Cheapflights offers flight deals from St. Louis to Harrisburg by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Harrisburg?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $347). Flying from St. Louis to Harrisburg in November is currently the most expensive (average of $408). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Harrisburg?

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

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Alternative routes for St. Louis to Harrisburg

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from St. Louis to Harrisburg

Discover the top 3 airlines that operate flights from St. Louis to Harrisburg. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$211Average$354FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$343FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$352FlexibilityNo cancel feeOn-time71%

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