HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Harrisburg

$113+ 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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MDT
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Harrisburg with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 January 29, 2026.

This CheapOair deal was found by Cheapflights users on 1/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/55:42 pm
STL
-
MDT
1 stop15h 50m
Frontier
Sat 2/78:25 pm
MDT
-
STL
1 stop12h 39m
Frontier
Deal found 1/27$213
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Fri 2/68:22 pm
STL
-
MDT
2 stops22h 08m
Frontier
Tue 2/1011:27 am
MDT
-
STL
1 stop12h 00m
Frontier
Deal found 1/27$222
This CheapOair deal was found by Cheapflights users on 1/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/55:42 pm
STL
-
MDT
1 stop15h 50m
Frontier
Sun 2/87:50 pm
MDT
-
STL
1 stop28h 43m
Frontier
Deal found 1/27$247
This Expedia deal was found by Cheapflights users on 1/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/104:54 pm
STL
-
MDT
1 stop22h 53m
Frontier
Sun 4/1210:06 pm
MDT
-
STL
1 stop10h 45m
Frontier
Deal found 1/28$250
This American Airlines deal was found by Cheapflights users on 1/29. 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.
Sat 2/2810:43 am
STL
-
MDT
1 stop6h 07m
American Airlines
Sat 3/77:35 pm
MDT
-
STL
1 stop4h 17m
American Airlines
Deal found 1/29$251
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/38:30 am
STL
-
MDT
1 stop4h 26m
United Airlines
Sun 3/86:15 am
MDT
-
STL
1 stop7h 12m
United Airlines
Deal found 1/27$260
This Delta deal was found by Cheapflights users on 1/27. 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 2/45:56 pm
STL
-
MDT
1 stop4h 04m
Delta
Sat 2/76:10 am
MDT
-
STL
1 stop4h 24m
Delta
Deal found 1/27$269
This United Airlines deal was found by Cheapflights users on 1/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/2710:00 am
STL
-
MDT
1 stop5h 44m
United Airlines
Sun 3/296:15 am
MDT
-
STL
1 stop5h 30m
United Airlines
Deal found 1/28$279
This Delta deal was found by Cheapflights users on 1/28. 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.
Sat 3/75:01 pm
STL
-
MDT
1 stop5h 26m
Delta
Sat 3/146:10 am
MDT
-
STL
1 stop4h 36m
Delta
Deal found 1/28$285
This American Airlines deal was found by Cheapflights users on 1/28. 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.
Fri 3/67:05 am
STL
-
MDT
1 stop6h 43m
American Airlines
Mon 3/96:31 pm
MDT
-
STL
1 stop15h 20m
American Airlines
Deal found 1/28$287

Find 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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$250
(Expedia)

One-way from

$113
(CheapOair)

Popular in

August

Cheapest in

July

Average price

$369
Provider with most accurate pricing for Lambert-St Louis-Harrisburg flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Harrisburg flights.
Search Deals
From Lambert-St Louis to Harrisburg
Search Deals
One-way flight from Lambert-St Louis to Harrisburg
Search Deals
High demand for flights, 4% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 2026.
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

Fri 4/10

4:54 pm-4:47 pm

1 stop22h 53m

Harrisburg

Sun 4/12

10:06 pm-7:51 am

1 stop10h 45m

$250

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 2/28

10:43 am-5:50 pm

1 stop6h 07m

Harrisburg

Sat 3/7

7:35 pm-10:52 pm

1 stop4h 17m

$251

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 3/7

5:01 pm-11:27 pm

1 stop5h 26m

Harrisburg

Sat 3/14

6:10 am-9:46 am

1 stop4h 36m

$251

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 3/3

8:30 am-1:56 pm

1 stop4h 26m

Harrisburg

Sun 3/8

6:15 am-12:27 pm

1 stop7h 12m

$260

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Wed 2/11

6:00 am-11:39 am

1 stop4h 39m

Harrisburg

Tue 2/17

5:55 pm-11:36 pm

1 stop6h 41m

$269

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 3/27

10:00 am-4:44 pm

1 stop5h 44m

Harrisburg

Sun 3/29

6:15 am-10:45 am

1 stop5h 30m

$279

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Tue 7/21

3:42 pm-11:40 pm

1 stop6h 58m

Harrisburg

Mon 7/27

6:25 pm-11:37 pm

1 stop6h 12m

$285

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 2/13

5:50 pm-11:00 pm

1 stop4h 10m

Harrisburg

Tue 2/17

5:55 pm-11:36 pm

1 stop6h 41m

$294

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Fri 2/13

5:50 pm-11:00 pm

1 stop4h 10m

Harrisburg

Wed 2/18

5:55 pm-11:36 pm

1 stop6h 41m

$294

St. LouisHarrisburg

STL - MDT

STLMDT

Lambert-St Louis

Sat 2/21

9:55 am-4:44 pm

1 stop5h 49m

Harrisburg

Wed 2/25

5:40 pm-9:40 pm

1 stop5h 00m

$330

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 19 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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Harrisburg flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 $124). Flying from St. Louis to Harrisburg in November is currently the most expensive (average of $248). 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 January 29, 2026.
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
8,128 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

7.9

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
8,128 reviews
Delta
7.9
Good
8,128 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

7.9

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
9,215 reviews
Delta
7.9
Good
8,128 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

7.9

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
11,205 reviews
Delta
7.9
Good
8,128 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

7.9

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 5h 26m. Fly via Frontier, American Airlines, or Delta 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 American Airlines is currently your cheapest option to Harrisburg, with prices starting at $248. Additional round-trip tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at $248 and $248, respectively. American Airlines is priced at 28% 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 American Airlines. According to our data, you can fly for as low as $236. Users have also found prices from $236 and $250 on United Airlines and Delta, 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, January is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $124). Flying from St. Louis to Harrisburg in November is currently the most expensive (average of $248). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Harrisburg

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to LaGuardia flights
St. Louis to Newark flights
Kansas City to John F Kennedy Intl flights
Kansas City to LaGuardia flights
St. Louis to John F Kennedy Intl flights
Kansas City to Newark flights
St. Louis to Dulles Intl flights
St. Louis to Philadelphia flights
St. Louis to Reagan-National flights
Kansas City to Dulles Intl flights
Kansas City to Reagan-National flights
Kansas City to Philadelphia flights
Springfield to John F Kennedy Intl flights
Springfield to Newark flights
Springfield to LaGuardia flights
St. Louis to Pittsburgh flights
Kansas City to Pittsburgh flights
Springfield to Dulles Intl flights
Kansas City to Harrisburg flights
Springfield to Reagan-National flights
Joplin to Reagan-National flights
Columbia to Reagan-National flights
Columbia to Dulles Intl flights
Springfield to Pittsburgh flights
St. Louis to Elmira flights
Columbia to Newark flights
Springfield to Harrisburg flights
Columbia to LaGuardia flights
Joplin to Dulles Intl flights
St. Louis to Allentown flights
Columbia to Philadelphia flights
Joplin to LaGuardia flights
Kansas City to Allentown flights
Columbia to John F Kennedy Intl flights
St. Louis to Scranton flights
Springfield to Philadelphia flights
Joplin to Newark flights
St. Louis to State College flights
Joplin to Philadelphia flights
Kansas City to Scranton flights
Springfield to Allentown flights
Kansas City to Elmira flights
Columbia to Pittsburgh flights
Kansas City to Erie flights
Branson to Philadelphia flights
Kansas City to Williamsport flights
Joplin to John F Kennedy Intl flights

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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$248Average$342FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$334FlexibilityNo cancel feeOn-time71%
DeltaCheapest$248Average$323FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.