$330+ Cheap flights from Harrisburg to St. Louis (MDT - STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — STL
Dec 9 — Dec 161
Round-trip
1 adult, Economy
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Find cheap flights from Harrisburg to St. Louis 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 Harrisburg to St. Louis
Cheapest
Best
Last-minute
Cheapest flights from Harrisburg to St. LouisExplore 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 November 9, 2026.
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 November 9, 2026.
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/26:17 am -
1 stop5h 13m
Wed 12/910:50 am -
1 stop6h 53m
Deal found 11/4![United Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/82:00 pm -
1 stop5h 16m
Sat 12/123:25 pm -
1 stop4h 29m
Deal found 11/6![United Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 11/4. 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 12/196:15 am -
1 stop4h 50m
Mon 12/286:21 pm -
1 stop3h 54m
Deal found 11/4![Delta logo]()
$335
This American Airlines deal was found by Cheapflights users on 11/5. 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 12/48:20 pm -
1 stop4h 42m
Thu 12/107:27 am -
1 stop5h 10m
Deal found 11/5![American Airlines logo]()
$349
This American Airlines deal was found by Cheapflights users on 11/7. 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 12/268:19 pm -
1 stop5h 01m
Thu 12/311:51 pm -
1 stop4h 12m
Deal found 11/7![American Airlines logo]()
$380
This American Airlines deal was found by Cheapflights users on 11/6. 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 11/136:34 am -
1 stop5h 19m
Mon 11/237:26 am -
1 stop6h 16m
Deal found 11/6![American Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/266:03 am -
1 stop7h 23m
Wed 12/307:18 am -
1 stop5h 17m
Deal found 11/8![United Airlines logo]()
$431
This Delta deal was found by Cheapflights users on 11/7. 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 12/246:15 am -
1 stop6h 20m
Mon 12/286:21 pm -
1 stop3h 54m
Deal found 11/7![Delta logo]()
$434
This American Airlines deal was found by Cheapflights users on 11/8. 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.
Wed 11/186:34 am -
1 stop5h 19m
Sat 11/2111:24 am -
1 stop7h 01m
Deal found 11/8![American Airlines logo]()
$437
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/266:03 am -
1 stop7h 23m
Fri 1/19:35 am -
1 stop6h 25m
Deal found 11/8![United Airlines logo]()
$440
Best flights from Harrisburg to St. LouisDiscover carefully curated flight deals from Harrisburg to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 9, 2026.
Discover carefully curated flight deals from Harrisburg to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 9, 2026.
This United Airlines deal was found by Cheapflights users on 11/5. 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 12/165:39 pm -
1 stop4h 44m
Wed 1/68:05 am -
1 stop4h 25m
Deal found 11/5![United Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 11/4. 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 12/196:15 am -
1 stop4h 50m
Mon 12/286:21 pm -
1 stop3h 54m
Deal found 11/4![Delta logo]()
$335
This American Airlines deal was found by Cheapflights users on 11/6. 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 2/47:43 am -
1 stop5h 40m
Tue 2/95:42 am -
1 stop7h 10m
Deal found 11/6![American Airlines logo]()
$340
This Delta deal was found by Cheapflights users on 11/8. 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 12/256:15 am -
1 stop6h 20m
Wed 12/306:21 pm -
1 stop3h 54m
Deal found 11/8![Delta logo]()
$340
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/252:10 pm -
1 stop5h 08m
Thu 12/313:00 pm -
1 stop5h 15m
Deal found 11/8![United Airlines logo]()
$349
This American Airlines deal was found by Cheapflights users on 11/8. 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 12/268:19 pm -
1 stop5h 01m
Thu 12/311:51 pm -
1 stop4h 12m
Deal found 11/8![American Airlines logo]()
$380
This United Airlines deal was found by Cheapflights users on 11/7. 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 2/36:20 am -
1 stop4h 48m
Sat 2/61:17 pm -
1 stop6h 32m
Deal found 11/7![United Airlines logo]()
$431
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/266:03 am -
1 stop7h 23m
Thu 12/313:00 pm -
1 stop5h 15m
Deal found 11/8![United Airlines logo]()
$440
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/252:10 pm -
1 stop5h 08m
Fri 1/11:25 pm -
1 stop4h 23m
Deal found 11/8![United Airlines logo]()
$449
Last-minute flights from Harrisburg to St. LouisDiscover last-minute flight deals from Harrisburg to St. Louis. Data last updated November 9, 2026 and is based on user searches.
Discover last-minute flight deals from Harrisburg to St. Louis. Data last updated November 9, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 11/6. 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 11/136:34 am -
1 stop5h 19m
Mon 11/237:26 am -
1 stop6h 16m
Deal found 11/6![American Airlines logo]()
$409
This American Airlines deal was found by Cheapflights users on 11/8. 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.
Wed 11/186:34 am -
1 stop5h 19m
Sat 11/2111:24 am -
1 stop7h 01m
Deal found 11/8![American Airlines logo]()
$437
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/26:17 am -
1 stop5h 13m
Wed 12/910:50 am -
1 stop6h 53m
Deal found 11/4![United Airlines logo]()
$330
This American Airlines deal was found by Cheapflights users on 11/5. 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 12/48:20 pm -
1 stop4h 42m
Thu 12/107:27 am -
1 stop5h 10m
Deal found 11/5![American Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/82:00 pm -
1 stop5h 16m
Sat 12/123:25 pm -
1 stop4h 29m
Deal found 11/6![United Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 11/4. 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 12/196:15 am -
1 stop4h 50m
Mon 12/286:21 pm -
1 stop3h 54m
Deal found 11/4![Delta logo]()
$335
This Delta deal was found by Cheapflights users on 11/7. 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 12/246:15 am -
1 stop6h 20m
Mon 12/286:21 pm -
1 stop3h 54m
Deal found 11/7![Delta logo]()
$434
This American Airlines deal was found by Cheapflights users on 11/7. 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 12/268:19 pm -
1 stop5h 01m
Thu 12/311:51 pm -
1 stop4h 12m
Deal found 11/7![American Airlines logo]()
$380
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/266:03 am -
1 stop7h 23m
Wed 12/307:18 am -
1 stop5h 17m
Deal found 11/8![United Airlines logo]()
$431
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/266:03 am -
1 stop7h 23m
Fri 1/19:35 am -
1 stop6h 25m
Deal found 11/8![United Airlines logo]()
$440
Find 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 November 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $330 (United Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $398 |
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 7,457,451 searches. Data last updated November 9, 2026.
Use the filters below to find and compare flights from Harrisburg to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HarrisburgSt. Louis
MDT Harrisburg - STL Lambert-St Louis
MDTSTL
Harrisburg
Wed 12/16
5:39 pm-9:23 pm
1 stop4h 44m
Lambert-St Louis
Wed 1/6
8:05 am-1:30 pm
1 stop4h 25m
$331
Quickest round-trip
HarrisburgSt. Louis
MDT Harrisburg - STL Lambert-St Louis
MDTSTL
Harrisburg
Sat 12/19
6:15 am-10:05 am
1 stop4h 50m
Lambert-St Louis
Mon 12/28
6:21 pm-11:15 pm
1 stop3h 54m
$335
HarrisburgSt. Louis
MDT Harrisburg - STL Lambert-St Louis
MDTSTL
Harrisburg
Thu 2/4
7:43 am-12:23 pm
1 stop5h 40m
Lambert-St Louis
Tue 2/9
5:42 am-1:52 pm
1 stop7h 10m
$340
HarrisburgSt. Louis
MDT Harrisburg - STL Lambert-St Louis
MDTSTL
Harrisburg
Fri 12/25
6:15 am-11:35 am
1 stop6h 20m
Lambert-St Louis
Wed 12/30
6:21 pm-11:15 pm
1 stop3h 54m
$340
HarrisburgSt. Louis
MDT Harrisburg - STL Lambert-St Louis
MDTSTL
Harrisburg
Fri 12/25
2:10 pm-6:18 pm
1 stop5h 08m
Lambert-St Louis
Thu 12/31
3:00 pm-9:15 pm
1 stop5h 15m
$349
HarrisburgSt. Louis
MDT Harrisburg - STL Lambert-St Louis
MDTSTL
Harrisburg
Sat 12/26
8:19 pm-12:20 am
1 stop5h 01m
Lambert-St Louis
Thu 12/31
1:51 pm-7:03 pm
1 stop4h 12m
$380
HarrisburgSt. Louis
MDT Harrisburg - STL Lambert-St Louis
MDTSTL
Harrisburg
Wed 2/3
6:20 am-10:08 am
1 stop4h 48m
Lambert-St Louis
Sat 2/6
1:17 pm-8:49 pm
1 stop6h 32m
$431
HarrisburgSt. Louis
MDT Harrisburg - STL Lambert-St Louis
MDTSTL
Harrisburg
Sat 12/26
6:03 am-12:26 pm
1 stop7h 23m
Lambert-St Louis
Thu 12/31
3:00 pm-9:15 pm
1 stop5h 15m
$440
HarrisburgSt. Louis
MDT Harrisburg - STL Lambert-St Louis
MDTSTL
Harrisburg
Fri 12/25
2:10 pm-6:18 pm
1 stop5h 08m
Lambert-St Louis
Fri 1/1
1:25 pm-6:48 pm
1 stop4h 23m
$449
Sorted by cheapest first
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 November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- 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.
MDT-STL
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
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 November 9, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, andAmerican Airlines from Harrisburg to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Food
7.2
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Food
7.2
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Food
7.2
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
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.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Wentzville
Maryland Heights
Chesterfield
Edwardsville
Glencoe
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Harrisburg and St. Louis flights
Browse other Harrisburg and St. Louis flight options. Last updated on November 9, 2026.
Popular flight searches
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Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on November 9, 2026.
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 7,457,451 searches. Data last updated November 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$268 | Average$398 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$287 | Average$392 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$304 | Average$462 | FlexibilityNo cancel fee | On-time69% |