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Harrisburg

$176+ 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 12/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MDT
Dec 24 — Dec 311
Wed 12/24
Wed 12/31
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 November 24, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$249
(American Airlines)

One-way from

$176
(Trip.com)

Popular in

April

Cheapest in

July

Average price

$339
Provider with most accurate pricing for Lambert-St Louis-Harrisburg flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Harrisburg flights.
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From Lambert-St Louis to Harrisburg
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One-way flight from Lambert-St Louis to Harrisburg
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($53 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 24, 2025.

This American Airlines deal was found by Cheapflights users on 11/23. 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.
Sun 12/215:16 pmSTL - MDT
1 stop5h 38mAmerican Airlines
Sat 12/275:09 amMDT - STL
1 stop4h 26mAmerican Airlines
Deal found 11/23$249
This American Airlines deal was found by Cheapflights users on 11/23. 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 12/123:22 pmSTL - MDT
1 stop7h 17mAmerican Airlines
Sun 12/145:00 amMDT - STL
1 stop4h 41mAmerican Airlines
Deal found 11/23$259
This Delta deal was found by Cheapflights users on 11/24. 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.
Tue 12/96:39 amSTL - MDT
1 stop4h 17mDelta
Sat 12/136:00 amMDT - STL
1 stop4h 50mDelta
Deal found 11/24$269
This American Airlines deal was found by Cheapflights users on 11/24. 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.
Tue 12/92:11 pmSTL - MDT
2 stops7h 03mAmerican Airlines
Sat 12/132:55 pmMDT - STL
1 stop6h 43mAmerican Airlines
Deal found 11/24$274
This American Airlines deal was found by Cheapflights users on 11/24. 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.
Tue 12/235:16 pmSTL - MDT
1 stop5h 38mAmerican Airlines
Sun 12/285:09 amMDT - STL
1 stop4h 26mAmerican Airlines
Deal found 11/24$318
This United Airlines deal was found by Cheapflights users on 11/23. 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 11/2510:00 amSTL - MDT
1 stop5h 53mUnited Airlines
Sat 11/296:15 amMDT - STL
1 stop4h 52mUnited Airlines
Deal found 11/23$357
This United Airlines deal was found by Cheapflights users on 11/22. 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 11/268:25 amSTL - MDT
1 stop4h 33mUnited Airlines
Fri 11/288:15 amMDT - STL
1 stop5h 13mUnited Airlines
Deal found 11/22$363
This United Airlines deal was found by Cheapflights users on 11/22. 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 12/236:35 pmSTL - MDT
1 stop4h 32mUnited Airlines
Tue 12/306:30 amMDT - STL
1 stop6h 57mUnited Airlines
Deal found 11/22$364
This American Airlines deal was found by Cheapflights users on 11/22. 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.
Sat 11/296:45 pmSTL - MDT
1 stop4h 37mAmerican Airlines
Sat 12/63:48 pmMDT - STL
1 stop6h 40mAmerican Airlines
Deal found 11/22$370
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:27 pmSTL - MDT
1 stop16h 49mMultiple Airlines
Mon 1/53:02 pmMDT - STL
2 stops20h 54mMultiple Airlines
Deal found 11/24$372
This United Airlines deal was found by Cheapflights users on 11/23. 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 12/196:35 pmSTL - MDT
1 stop4h 32mUnited Airlines
Mon 12/226:30 amMDT - STL
1 stop17h 13mUnited Airlines
Deal found 11/23$431
This United Airlines deal was found by Cheapflights users on 11/22. 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 12/236:35 pmSTL - MDT
1 stop4h 32mUnited Airlines
Sun 12/286:30 amMDT - STL
1 stop6h 57mUnited Airlines
Deal found 11/22$433

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 November 24, 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

Tue 12/9

6:39 am-11:56 am

1 stop4h 17m

Harrisburg

Sat 12/13

6:00 am-9:50 am

1 stop4h 50m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 12/9

1:00 pm-8:57 pm

1 stop6h 57m

Harrisburg

Sat 12/13

8:20 am-12:15 pm

1 stop4h 55m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 12/12

5:12 pm-11:13 pm

1 stop5h 01m

Harrisburg

Sun 12/14

6:00 am-10:45 am

1 stop5h 45m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 12/9

2:11 pm-10:14 pm

2 stops7h 03m

Harrisburg

Sat 12/13

8:42 am-1:18 pm

1 stop5h 36m

$274

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 1/31

5:56 pm-10:56 pm

1 stop4h 00m

Harrisburg

Wed 2/4

6:02 pm-11:37 pm

1 stop6h 35m

$284

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 12/23

5:16 pm-11:54 pm

1 stop5h 38m

Harrisburg

Sun 12/28

5:09 am-8:35 am

1 stop4h 26m

$318

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 12/20

4:27 pm-10:16 am

1 stop16h 49m

Harrisburg

Mon 1/5

3:02 pm-10:56 am

2 stops20h 54m

$372

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 12/19

6:35 pm-12:07 am

1 stop4h 32m

Harrisburg

Mon 12/22

6:30 am-10:43 pm

1 stop17h 13m

$431

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 12/12

3:19 pm-8:58 pm

1 stop4h 39m

Harrisburg

Sun 12/14

6:15 am-8:57 pm

2 stops15h 42m

$497

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 12/20

4:27 pm-10:16 am

1 stop16h 49m

$176

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/22

Showing 1-10 of 14 results
1
2

Compare providers for flights from St. Louis to Harrisburg

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Harrisburg in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Harrisburg flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Harrisburg flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Harrisburg flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Harrisburg flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Harrisburg flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, January is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $123). Flying from St. Louis to Harrisburg in December is currently the most expensive (average of $262). 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.

How much does it cost to fly round-trip from St. Louis to Harrisburg?

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 November 24, 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
7.9
Good
7,997 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
7,997 reviews
Delta
7.9
Good
7,997 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,037 reviews
Delta
7.9
Good
7,997 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,046 reviews
Delta
7.9
Good
7,997 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 17m. Fly via Delta, United Airlines, 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 $242. 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 31% lower than the current average price of a flight leaving 3 months from now.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $123). Flying from St. Louis to Harrisburg in December is currently the most expensive (average of $262). 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
Mechanicsburg
Hershey
Carlisle
Camp Hill

Browse thousands of different options on Cheapflights for your next trip

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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 November 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$242Average$352FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$343FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$351FlexibilityNo cancel feeOn-time71%

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