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Harrisburg

$167+ 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 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MDT
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$249
(Delta)

One-way from

$167
(Kiwi.com)

Popular in

April

Cheapest in

July

Average price

$313
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
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Highest demand for flights based on searches. 12% potential increase in price ($52 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 October 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 October 30, 2025.

This Delta deal was found by Cheapflights users on 10/28. 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 12/126:05 pmSTL - MDT
1 stop4h 02mDelta
Sun 12/146:00 amMDT - STL
1 stop5h 45mDelta
Deal found 10/28$249
This American Airlines deal was found by Cheapflights users on 10/28. 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 12/24:46 pmSTL - MDT
1 stop5h 52mAmerican Airlines
Sat 12/66:47 amMDT - STL
1 stop4h 30mAmerican Airlines
Deal found 10/28$251
This Delta deal was found by Cheapflights users on 10/29. 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 11/1211:39 amSTL - MDT
1 stop5h 37mDelta
Sun 11/166:00 amMDT - STL
1 stop4h 46mDelta
Deal found 10/29$269
This Delta deal was found by Cheapflights users on 10/28. 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 10/315:15 pmSTL - MDT
1 stop4h 53mDelta
Wed 11/511:44 amMDT - STL
1 stop5h 26mDelta
Deal found 10/28$280
This American Airlines deal was found by Cheapflights users on 10/29. 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 12/264:53 pmSTL - MDT
1 stop6h 06mAmerican Airlines
Thu 1/15:00 amMDT - STL
1 stop4h 35mAmerican Airlines
Deal found 10/29$294
This Delta deal was found by Cheapflights users on 10/28. 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 10/293:59 pmSTL - MDT
1 stop6h 09mDelta
Tue 11/46:25 pmMDT - STL
1 stop4h 39mDelta
Deal found 10/28$313
This Delta deal was found by Cheapflights users on 10/28. 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.
Thu 10/3011:21 amSTL - MDT
1 stop5h 09mDelta
Wed 11/56:00 amMDT - STL
1 stop5h 26mDelta
Deal found 10/28$319
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 10/3010:36 amSTL - MDT
1 stop5h 26mAmerican Airlines
Tue 11/46:53 amMDT - STL
2 stops7h 20mAmerican Airlines
Deal found 10/28$324
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Thu 12/113:30 pmSTL - MDT
1 stop18h 15mMultiple Airlines
Sun 12/149:30 amMDT - STL
2 stops10h 06mMultiple Airlines
Deal found 10/30$326
This Delta deal was found by Cheapflights users on 10/28. 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 10/316:14 pmSTL - MDT
1 stop3h 46mDelta
Sun 11/25:10 amMDT - STL
1 stop4h 27mDelta
Deal found 10/28$330
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Thu 11/2710:53 amSTL - MDT
2 stops22h 26mMultiple Airlines
Thu 12/47:28 pmMDT - STL
1 stop28h 05mMultiple Airlines
Deal found 10/29$338
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Sat 12/206:35 pmSTL - MDT
1 stop4h 32mUnited Airlines
Sat 1/36:30 amMDT - STL
1 stop6h 57mUnited Airlines
Deal found 10/30$346

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 October 30, 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

Thu 11/27

7:11 am-2:54 pm

1 stop6h 43m

Harrisburg

Tue 12/2

8:10 pm-11:56 pm

1 stop4h 46m

$249

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 12/12

6:05 pm-11:07 pm

1 stop4h 02m

Harrisburg

Sun 12/14

6:00 am-10:45 am

1 stop5h 45m

$249

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 11/27

8:25 am-1:58 pm

1 stop4h 33m

Harrisburg

Thu 12/4

8:20 am-12:15 pm

1 stop4h 55m

$249

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Thu 12/11

2:54 pm-10:14 pm

1 stop6h 20m

Harrisburg

Sun 12/14

11:49 am-4:19 pm

1 stop5h 30m

$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

Wed 11/12

11:39 am-6:16 pm

1 stop5h 37m

Harrisburg

Sun 11/16

6:00 am-9:46 am

1 stop4h 46m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 11/12

2:52 pm-10:10 pm

1 stop6h 18m

Harrisburg

Sat 11/15

8:42 am-1:17 pm

1 stop5h 35m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 12/20

6:35 pm-12:07 am

1 stop4h 32m

Harrisburg

Sat 1/3

6:30 am-12:27 pm

1 stop6h 57m

$346

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 1/17

3:54 pm-11:58 pm

1 stop7h 04m

Harrisburg

Mon 1/19

12:53 pm-6:34 pm

1 stop6h 41m

$359

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 1/3

9:50 am-11:40 am

2 stops24h 50m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 18 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 October.
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 $251). 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 October 30, 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
7,998 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,035 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 02m. Fly via American Airlines, Delta, or United 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 $251). 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

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$242Average$350FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$343FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$351FlexibilityNo cancel feeOn-time71%

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