MDT - STL

$98 Find Cheap Flights from Harrisburg to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harrisburg to St. Louis departing on 4/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harrisburg to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harrisburg to St. Louis, as well as popular online travel agencies
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$310
Typical prices: $253-$426
Delta
Tue 4/14Sat 4/18
MDT - STL • 1 stop
Cheapest one-way
$98
Typical prices: $123-$185
Frontier
Mon 4/6
MDT - STL • 1 stop
Top airlines
Cheapest • from $291 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Harrisburg and St. Louis. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $313 (round-trip)
Shortest trip • 4h 39m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Harrisburg to St. Louis (MDT-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harrisburg to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Harrisburg to St. Louis

Tue, Apr 14 - Sat, Apr 18
Delta Logo
4:19 pm - 8:44 pm
MDT
-
STL
5h 25m
1 stop
Delta Logo
5:59 pm - 11:03 pm
STL
-
MDT
4h 04m
1 stop
$310Delta
Thu, Jul 30 - Sun, Aug 2
Delta Logo
12:25 pm - 3:58 pm
MDT
-
STL
4h 33m
1 stop
Delta Logo
6:45 am - 11:51 am
STL
-
MDT
4h 06m
1 stop
$329Delta
Thu, Apr 9 - Sun, Apr 12
United Airlines Logo
5:52 pm - 9:13 pm
MDT
-
STL
4h 21m
1 stop
United Airlines Logo
7:45 am - 1:30 pm
STL
-
MDT
4h 45m
1 stop
$363United Airlines
Sat, Apr 25 - Wed, Apr 29
United Airlines Logo
8:29 am - 12:22 pm
MDT
-
STL
4h 53m
1 stop
United Airlines Logo
9:10 am - 4:51 pm
STL
-
MDT
6h 41m
1 stop
$371United Airlines
Thu, Jul 30 - Sun, Aug 2
Delta Logo
11:56 am - 4:14 pm
MDT
-
STL
5h 18m
1 stop
Delta Logo
6:00 am - 2:10 pm
STL
-
MDT
7h 10m
1 stop
$388Delta
Fri, Apr 24 - Tue, Apr 28
United Airlines Logo
5:53 pm - 9:52 pm
MDT
-
STL
4h 59m
1 stop
United Airlines Logo
6:30 am - 1:33 pm
STL
-
MDT
6h 03m
1 stop
$390United Airlines
Thu, Jul 30 - Sun, Aug 2
American Airlines Logo
7:27 pm - 11:56 pm
MDT
-
STL
5h 29m
1 stop
American Airlines Logo
5:48 pm - 11:05 pm
STL
-
MDT
4h 17m
1 stop
$399American Airlines
Sat, May 16 - Mon, May 18
American Airlines Logo
6:43 pm - 11:56 pm
MDT
-
STL
6h 13m
1 stop
American Airlines Logo
6:54 pm - 12:31 am
STL
-
MDT
4h 37m
1 stop
$410American Airlines
Sun, Jul 12 - Sat, Jul 18
Delta Logo
6:00 am - 10:45 am
MDT
-
STL
5h 45m
1 stop
Delta Logo
5:45 pm - 10:44 pm
STL
-
MDT
3h 59m
1 stop
$422Delta
Sun, Jul 12 - Sat, Jul 18
Delta Logo
6:10 am - 9:30 am
MDT
-
STL
4h 20m
1 stop
Delta Logo
5:30 pm - 11:41 pm
STL
-
MDT
5h 11m
1 stop
$434Delta
Booking Insights

KAYAK's insights & trends for Harrisburg to St. Louis flights

Get data-powered insights and trends into flights from Harrisburg to St. Louis to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Harrisburg to St. Louis?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Harrisburg to St. Louis departing in April.

What is the cheapest month to fly from Harrisburg to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Harrisburg to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Harrisburg to St. Louis is May, where tickets cost $298 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $466 and $448 respectively.

Good to know

Low seasonJanuary
Cheapest flight$98
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Harrisburg to St. Louis

When to book flights from Harrisburg to St. Louis

Are your dates flexible? Find out the best times to travel from Harrisburg to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Harrisburg to St. Louis

  • What is the cheapest flight from Harrisburg to St. Louis?

    In the last 3 days, the lowest price for a flight from Harrisburg to St. Louis was $98 for a one-way ticket and $291 for a round-trip.

  • Do I need a passport to fly between Harrisburg and St. Louis?

    A passport is not required to fly from Harrisburg to St. Louis.

  • Which airports will I be using when flying from Harrisburg to St. Louis?

    On your way to St. Louis, you’ll fly out from Harrisburg. You’ll be landing at Lambert-St Louis.

  • Which aircraft models fly most regularly from Harrisburg to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Harrisburg to St. Louis?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Harrisburg and St. Louis, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Harrisburg to St. Louis, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Harrisburg to St. Louis are Delta and United Airlines. With an average price for the route of $323 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $425 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Harrisburg to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Harrisburg to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Harrisburg to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Harrisburg is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Harrisburg to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Harrisburg with another airline. Booking your flights between Harrisburg and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Harrisburg to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Harrisburg up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Harrisburg to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Harrisburg to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Harrisburg to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8314 reviews
8.1Boarding
7.9Comfort
7.8Entertainment
7.2Food
8.5Crew
Airline reviews

the crew cancel the morning service due to the weather. Then the flight got deverted to Nashville . we were on the ground for over two hours the only gave us water once... no food or any snacks.... the crew should have handled better and offered something to passengers.

2.0 MediocreAnonymous, Mar 2026
HNL - ATL
Read more Delta reviews

the crew cancel the morning service due to the weather. Then the flight got deverted to Nashville . we were on the ground for over two hours the only gave us water once... no food or any snacks.... the crew should have handled better and offered something to passengers.

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

Delta needs to step its game up get a more reliable internet service. Internet service was non-existent for this flight.

Mechanical Delay of over an hour with multiple gate changes. Entertainment system down for rejuvenation.

I had a flight cancel and had it rerouted. When the rerouted they put me at a window seat instead of an isle. It was hard sitting by the window because the couple with masks on were making out. I get motion sickness which is why I need to have the isle seat.

NEVER MADE THE FLIGHT BECAUSE DELTA SAID THEY CAN NOT

THEY FAILED ME AND I NEVER GOT ON THE FLIGHT BECAUSE IT WAS SO DELAYED! I ENDED UP HAVING TO PAY OUT OF POCKET FOR A HOTEL AND STAY IN NASHVILLE TO CATCH A FLIGHT FOR THE FOLLOWING DAY. DELTA IS POOR CUSTOMER SERVICE>

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

Experience was great - no complaints. Took off on time, landed early. Got to the gate relatively quickly - took a little bit of extra time to deplane but nothing excessive.

Economy plus was so cramped I could not use my laptop. It was beyond bad.

OK, we were delayed and had to de plane and reboard.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

They are always late and seats was also not having working charger

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Everything you need to know for your flight from Harrisburg to St. Louis

Information on your arrival and departure airports