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$99+ Cheap flights from Harrisburg to St. Louis (MDT - STL)

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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — STL
Apr 16 — Apr 231
Wed 4/16
Wed 4/23
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Harrisburg to Lambert-St Louis are usually found in October or September, booked 23 days in advance, depart on a Thursday or Saturday and return on a Thursday

Cheap flight deals from Harrisburg to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Harrisburg (MDT) to St. Louis (STL). 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 April 11, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$249
(Delta)

One-way from

$99
(Frontier)

Popular in

April

Cheapest in

October

Average price

$430
Provider with most accurate pricing for Harrisburg-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Harrisburg-Lambert-St Louis flights.
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From Harrisburg to Lambert-St Louis
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One-way flight from Harrisburg to Lambert-St Louis
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Highest demand for flights based on searches. 6% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Harrisburg to St. Louis

Cheapest flights from Harrisburg to St. Louis
Explore the most affordable flight options available from Harrisburg to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

This Delta deal was found by Cheapflights users on 4/10. 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 5/16:19 pmMDT - STL
1 stop6h 17mDelta
Sun 5/410:53 amSTL - MDT
1 stop5h 41mDelta
Deal found 4/10$249
This Booking.com deal was found by Cheapflights users on 4/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/125:40 pmMDT - STL
1 stop7h 06mFrontier
Sun 4/134:57 pmSTL - MDT
1 stop21h 09mFrontier
Deal found 4/10$290
This American Airlines deal was found by Cheapflights users on 4/10. 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 5/235:00 amMDT - STL
1 stop4h 56mAmerican Airlines
Sun 5/256:47 pmSTL - MDT
1 stop4h 08mAmerican Airlines
Deal found 4/10$294
This United Airlines deal was found by Cheapflights users on 4/10. 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 4/256:30 amMDT - STL
1 stop6h 50mUnited Airlines
Tue 4/295:35 pmSTL - MDT
1 stop4h 00mUnited Airlines
Deal found 4/10$329
This Mytrip deal was found by Cheapflights users on 4/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/95:06 pmMDT - STL
1 stop17h 09mMultiple Airlines
Fri 5/169:50 amSTL - MDT
3 stops21h 35mMultiple Airlines
Deal found 4/10$346

Cheapflights Fare Finder

Customize your flight search to find flights from Harrisburg to St. Louis 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 April 11, 2025.
Use the filters below to find and compare flights from Harrisburg to St. Louis that are best for you.

Fly from

Harrisburg

Fly to

St. Louis

Route

Depart

Return

Price

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Thu 5/1

6:19 pm-11:36 pm

1 stop6h 17m

Lambert-St Louis

Sun 5/4

10:53 am-5:34 pm

1 stop5h 41m

$249

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Mon 4/28

7:40 pm-6:41 pm

2 stops24h 01m

Lambert-St Louis

Sun 5/4

6:10 pm-4:16 pm

1 stop21h 06m

$288

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Fri 4/25

6:30 am-12:20 pm

1 stop6h 50m

Lambert-St Louis

Tue 4/29

5:35 pm-10:35 pm

1 stop4h 00m

$329

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Fri 5/23

5:00 am-8:56 am

1 stop4h 56m

Lambert-St Louis

Mon 5/26

5:00 am-11:21 am

1 stop5h 21m

$356

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Thu 5/1

6:27 pm-12:06 am

1 stop6h 39m

$99

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Fri 5/9

5:06 pm-9:15 am

1 stop17h 09m

$127

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Tue 10/7

6:39 am-12:11 pm

1 stop6h 32m

$207

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Sat 5/3

6:00 am-9:28 am

1 stop4h 28m

$220

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Compare providers for flights from Harrisburg to St. Louis

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 Harrisburg to St. Louis in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust 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 Harrisburg-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harrisburg-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harrisburg-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Harrisburg-St. Louis 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 Harrisburg-St. Louis 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 Harrisburg to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Harrisburg 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 Harrisburg to St. Louis

How far ahead should I book a flight from Harrisburg to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Harrisburg to St. Louis. Price data was last updated on April 4, 2025.

Booking 23 days in advance of your planned departure date is, on average, the best time to get cheap flights from Harrisburg to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Harrisburg to St. Louis (average of $311). Flying from Harrisburg to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from MDT to STL?

Find hourly flight availability from Harrisburg to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 11, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 17% on flights from Harrisburg to St. Louis by exploring options for tickets at noon.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated April 11, 2025.
Delta
8.0
Very good
7,910 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,910 reviews
Delta
8.0
Very good
7,910 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,636 reviews
Delta
8.0
Very good
7,910 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,910 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Frontier
6.0
Okay
3,277 reviews
Delta
8.0
Very good
7,910 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

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

    Delta, at $249, was found to be the cheapest airline from Harrisburg to St. Louis.Alternate airlines to your destination round-trip include United Airlines and American Airlines. Delta is currently priced 27% below the average price you’ll pay for this route.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $99. American Airlines flights start at $207 while deals on Delta start at $220 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Harrisburg to St. Louis 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 Harrisburg to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Harrisburg to St. Louis (average of $311). Flying from Harrisburg to St. Louis in March is currently the most expensive (average of $356). 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
Fenton
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
Chesterfield

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Alternative routes for Harrisburg to St. Louis

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

Discover the top 3 airlines that operate flights from Harrisburg to St. Louis. 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 April 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$238Average$367FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$248Average$344FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$248Average$349FlexibilityNo cancel feeOn-time69%

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