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$232 Cheap Flights from St. Louis (STL) to Harrisburg (MDT)

View $232 flight on Mon, Nov 9, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Harrisburg Intl. Airport (MDT)

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

Prices were available within the past 7 days and start at $232 for one-way flights and $301 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Nov 10 - Tue, Nov 17
STL
St. Louis
MDT
Harrisburg
$301 Roundtrip, found 20 hours ago
$301
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Tue, Nov 10 from St. Louis to Harrisburg, returning Tue, Nov 17, priced at $301 found 20 hours ago
United
Tue, Nov 10 - Tue, Nov 17
STL
St. Louis
MDT
Harrisburg
$308 Roundtrip, found 20 hours ago
$308
Roundtrip
found 20 hours ago
Select United flight, departing Tue, Nov 10 from St. Louis to Harrisburg, returning Tue, Nov 17, priced at $308 found 20 hours ago
American Airlines
Thu, Oct 29 - Tue, Nov 3
STL
St. Louis
MDT
Harrisburg
$310 Roundtrip, found 9 hours ago
$310
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Thu, Oct 29 from St. Louis to Harrisburg, returning Tue, Nov 3, priced at $310 found 9 hours ago
United
Tue, Nov 3 - Tue, Nov 10
STL
St. Louis
MDT
Harrisburg
$311 Roundtrip, found 23 hours ago
$311
Roundtrip
found 23 hours ago
Select United flight, departing Tue, Nov 3 from St. Louis to Harrisburg, returning Tue, Nov 10, priced at $311 found 23 hours ago
United
Tue, Nov 10 - Tue, Nov 17
STL
St. Louis
MDT
Harrisburg
$312 Roundtrip, found 20 hours ago
$312
Roundtrip
found 20 hours ago
Select United flight, departing Tue, Nov 10 from St. Louis to Harrisburg, returning Tue, Nov 17, priced at $312 found 20 hours ago
American Airlines
Thu, Dec 10 - Sun, Dec 13
STL
St. Louis
MDT
Harrisburg
$319 Roundtrip, found 9 hours ago
$319
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Thu, Dec 10 from St. Louis to Harrisburg, returning Sun, Dec 13, priced at $319 found 9 hours ago
Delta
Tue, Nov 10 - Tue, Nov 17
STL
St. Louis
MDT
Harrisburg
$321 Roundtrip, found 20 hours ago
$321
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Nov 10 from St. Louis to Harrisburg, returning Tue, Nov 17, priced at $321 found 20 hours ago
United
Fri, Jan 8 - Sun, Jan 10
STL
St. Louis
MDT
Harrisburg
$324 Roundtrip, found 23 hours ago
$324
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Jan 8 from St. Louis to Harrisburg, returning Sun, Jan 10, priced at $324 found 23 hours ago
Delta
Wed, Oct 7 - Wed, Oct 14
STL
St. Louis
MDT
Harrisburg
$330 Roundtrip, found 4 days ago
$330
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Oct 7 from St. Louis to Harrisburg, returning Wed, Oct 14, priced at $330 found 4 days ago
United
Sat, Jan 16 - Sat, Jan 23
STL
St. Louis
MDT
Harrisburg
$333 Roundtrip, found 5 days ago
$333
Roundtrip
found 5 days ago
Select United flight, departing Sat, Jan 16 from St. Louis to Harrisburg, returning Sat, Jan 23, priced at $333 found 5 days ago

Alternative airports near Harrisburg

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Harrisburg Intl. MDT. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $334
MDT
Harrisburg Intl.
Cheapest
Average driving time to city center16 min
Flights from $334

What you need to know for your flight from Lambert-St. Louis Intl. to Harrisburg Intl.

St. Louis (STL) to Harrisburg (MDT) at a glance

Embark on your journey from St. Louis (STL) to Harrisburg (MDT) with a selection of airlines providing service on this domestic short-haul route. Explore your options among both full-service and low-cost carriers to discover the itinerary that aligns with your budget, schedule, and travel aspirations as you uncover the iconic attractions and neighborhoods of Harrisburg. Get ready to find all the essential information for flights from Lambert-St. Louis International Airport (STL) to Harrisburg International Airport (MDT).

  • Fastest flight duration: around 3h 30m in-flight, plus roughly 1h 15m layover with one stop
  • Route distance: roughly 700 miles (1,130 km)
  • Flights per week: around 10 departures on average
  • Typical fares (one-way): economy tickets often range from $120–$440, depending on seasonality and how far ahead you book

Flights from Lambert-St. Louis International Airport (STL) to Harrisburg International Airport (MDT)

According to the latest traveler bookings, here are the top airlines preferred for journeys from St. Louis to Harrisburg, particularly for one-stop service. Common layover points include O'Hare International Airport (ORD) with a layover of about 1 hour, Charlotte-Douglas International Airport (CLT) at approximately 1 hour and 15 minutes, and Detroit Metropolitan Wayne County Airport (DTW), also around 1 hour and 15 minutes. This variety allows you to mix and match options for price, total travel time, and cabin class to find your ideal itinerary.

  • American Airlines: This full-service airline provides one-stop flights, with one-way ticket prices typically ranging from $125 to $410. It represents about 49% of the departures on this route, featuring an in-flight duration of 3 hours and 30 minutes, and an overall travel time of approximately 4 hours and 30 minutes, including layover time.
  • Delta: As a full-service airline, Delta offers one-stop service with one-way fares generally between $120 and $440. It accounts for roughly 28% of departures on this route, with a flight time of 3 hours and 30 minutes and a total travel duration of around 4 hours and 30 minutes, factoring in the layover.
  • United: Another full-service carrier, United provides one-stop flights with one-way fares typically falling between $125 and $470. It makes up about 22% of the departures on this route, with an in-flight time of 3 hours and 30 minutes and a total journey time of roughly 4 hours and 30 minutes, including layover.
  • Frontier Airlines: This low-cost airline offers one-stop services, with one-way fares generally ranging from $120 to $220. It accounts for approximately 2% of departures on this route, featuring a flight time of 3 hours and 30 minutes, with an overall travel duration of about 4 hours and 30 minutes, including layover.

Best time to fly from St. Louis (STL) to Harrisburg (MDT)

The most popular months for travelers flying from St. Louis to Harrisburg are February, March, and April, when peak temperatures in Harrisburg reach up to 51.3°F in April. If you prefer quieter travel, consider October, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 55°F. For better deals, July usually offers the lowest average one-way fare around $206. Flight availability peaks in November, with approximately 12 flights per week, making it easier to find convenient departure times. January and December have the fewest flights, with approximately 8 flights per week.

  • Cheapest time to fly: July usually offers good deals with average one-way fare around $206, roughly 13% cheaper than the yearly average.
  • More budget-friendly months to fly: August, May, and October typically offer average one-way fares roughly ranging from $210 to $223.
  • Most flight options: November has the highest number of flights from St. Louis to Harrisburg, with approximately 12 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January29.8°F (-1.2°C)Average8$268
February32.2°F (0.1°C)Moderately High9$253
March40.3°F (4.6°C)Moderately High10$282
April51.3°F (10.7°C)Moderately High10$239
May61.3°F (16.3°C)Average11$216
June69.6°F (20.9°C)Moderately Low9$254
July75.2°F (24.0°C)Average9$206
August72.9°F (22.7°C)Average10$210
September66.2°F (19.0°C)Average10$236
October55.0°F (12.8°C)Moderately Low11$223
November42.8°F (6.0°C)Average12$230
December35.6°F (2.0°C)Moderately Low8$233

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from St. Louis (STL) to Harrisburg (MDT)

  • St. Louis to Harrisburg (STL-HAR): Capital City Airport (HAR) is located roughly 5 miles from Harrisburg International Airport (MDT).
  • St. Louis to Lancaster (STL-LNS): Lancaster Airport (LNS) lies about 25 miles away from Harrisburg International Airport (MDT).

How to find the best prices for flights from St. Louis (STL) to Harrisburg (MDT)

Getting some of the best deals on flights from St. Louis to Harrisburg is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking 2-8 weeks in advance, although most travelers tend to book within 2 weeks. Departures in the morning (from 5 a.m. to 12 p.m.) often offer lower prices and are also the most popular flight times. Additionally, flying on Tuesday typically results in cheaper rates, while Friday is the most sought-after travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Harrisburg hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Harrisburg International Airport from Lambert-St. Louis International Airport

Harrisburg welcomes travelers from St. Louis with a range of transport options based on price, convenience, and proximity. Harrisburg city center is approximately a 15-minute drive (covering about 12 miles) from Harrisburg International Airport, depending on traffic. Here's how to reach Harrisburg efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Harrisburg, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from Harrisburg International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Harrisburg International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Harrisburg International Airport, Middletown Station, a train station, is located about 1.8 miles away by car, providing convenient access for travelers.

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) cost?
You can find cheap one-way flights from $232 and cheap return flights from $301 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) with Expedia. One-way flights generally range between $238 and $677, and roundtrip flights usually range from $349 to $1068. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
April is the cheapest month to fly from St. Louis, MO (STL) to Harrisburg, PA (MDT), with average return fares around $338. This is about 17% lower than the average price throughout the year, as April often sees a drop in travel demand after the spring break period. Other cheap months to fly from St. Louis to Harrisburg include September and November.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
Enter STL to MDT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
The best time to fly from St. Louis (STL) to Harrisburg (MDT) is in April or November, with average return flight prices around $338. These months are not only budget-friendly but also offer a pleasant travel experience, as they avoid the peak holiday crowds.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
The earliest flight from St. Louis Lambert International Airport (STL) to Harrisburg (MDT) typically departs at 5:00 AM, operated by American Airlines. This is a seasonal service active in December, making it a good choice if you're looking to travel during that time. An early flight allows you to arrive in Harrisburg with a full day ahead of you. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
The most popular departure times for flights from St. Louis (STL) to Harrisburg (MDT) are in the early morning, from 6am to 9am. This time window accounts for around 35% of total traffic. Major airlines like American Airlines, Delta, and United Airlines offer flights during this period. Many travelers prefer this timing because it allows for a full day of activities upon arrival.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
A flight from STL to MDT with a layover takes around 4 hours 30 minutes, with the route covering approximately 732 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
You can fly first class between STL and MDT. First class cabins are available on:

  • American Airlines
  • Delta Air Lines
  • United Airlines

How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Harrisburg from Lambert-St. Louis Intl. (STL)?
If you're planning to travel to Harrisburg from Lambert-St. Louis Intl. (STL), you can fly into Harrisburg Intl. (MDT) Some flights may connect through major hubs like O'Hare Intl. (ORD), George Bush Intercontinental (IAH), Washington Dulles Intl. (IAD) before reaching Harrisburg. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Harrisburg, PA (MDT-Harrisburg Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Harrisburg Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$300
Distance
732 mi

Book with confidence

St. Louis to Harrisburg Flights

The cheapest times to fly from St. Louis to Harrisburg

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Harrisburg are during the month of November. You can find some of the cheapest flights from St. Louis to Harrisburg with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Harrisburg

Sunday is one of the best days to book for cheap flights from St. Louis to Harrisburg: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Harrisburg

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Harrisburg in 2026. You can also book with separate airlines for your outbound and return journeys, from $232 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Harrisburg flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Harrisburg airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Harrisburg Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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