$264 Cheap Flights from Harrisburg (MDT) to Great Falls (GTF)

View $264 flight on Sat, Jul 12, 2025Opens in a new window

Popular airlines from Harrisburg Intl. Airport (MDT) to Great Falls, MT (GTF-Great Falls Intl.)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Harrisburg to Great Falls (MDT-GTF)

Prices were available within the past 7 days and start at $264 for one-way flights and $308 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Sep 13 - Tue, Sep 23
MDT
Harrisburg
GTF
Great Falls
$308 Roundtrip, found 5 days ago
$308
Roundtrip
found 5 days ago
Select United flight, departing Sat, Sep 13 from Harrisburg to Great Falls, returning Tue, Sep 23, priced at $308 found 5 days ago
Delta
Wed, Jul 2 - Tue, Jul 15
MDT
Harrisburg
GTF
Great Falls
$344 Roundtrip, found 4 days ago
$344
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Jul 2 from Harrisburg to Great Falls, returning Tue, Jul 15, priced at $344 found 4 days ago
United
Tue, Aug 12 - Sat, Aug 16
MDT
Harrisburg
GTF
Great Falls
$374 Roundtrip, found 2 days ago
$374
Roundtrip
found 2 days ago
Select United flight, departing Tue, Aug 12 from Harrisburg to Great Falls, returning Sat, Aug 16, priced at $374 found 2 days ago
United
Tue, Jul 29 - Tue, Aug 12
MDT
Harrisburg
GTF
Great Falls
$379 Roundtrip, found 4 days ago
$379
Roundtrip
found 4 days ago
Select United flight, departing Tue, Jul 29 from Harrisburg to Great Falls, returning Tue, Aug 12, priced at $379 found 4 days ago
United
Sat, Aug 9 - Wed, Aug 13
MDT
Harrisburg
GTF
Great Falls
$384 Roundtrip, found 2 days ago
$384
Roundtrip
found 2 days ago
Select United flight, departing Sat, Aug 9 from Harrisburg to Great Falls, returning Wed, Aug 13, priced at $384 found 2 days ago
United
Sat, Aug 9 - Wed, Aug 13
MDT
Harrisburg
GTF
Great Falls
$389 Roundtrip, found 2 days ago
$389
Roundtrip
found 2 days ago
Select United flight, departing Sat, Aug 9 from Harrisburg to Great Falls, returning Wed, Aug 13, priced at $389 found 2 days ago
United
Sat, Sep 13 - Tue, Sep 23
MDT
Harrisburg
GTF
Great Falls
$398 Roundtrip, found 5 days ago
$398
Roundtrip
found 5 days ago
Select United flight, departing Sat, Sep 13 from Harrisburg to Great Falls, returning Tue, Sep 23, priced at $398 found 5 days ago
United
Sat, Sep 27 - Wed, Oct 8
MDT
Harrisburg
GTF
Great Falls
$404 Roundtrip, found 5 days ago
$404
Roundtrip
found 5 days ago
Select United flight, departing Sat, Sep 27 from Harrisburg to Great Falls, returning Wed, Oct 8, priced at $404 found 5 days ago
Delta
Wed, Jul 2 - Fri, Jul 4
MDT
Harrisburg
GTF
Great Falls
$429 Roundtrip, found 14 hours ago
$429
Roundtrip
found 14 hours ago
Select Delta flight, departing Wed, Jul 2 from Harrisburg to Great Falls, returning Fri, Jul 4, priced at $429 found 14 hours ago
United
Sat, May 17 - Sat, May 24
MDT
Harrisburg
GTF
Great Falls
$433 Roundtrip, found 5 hours ago
$433
Roundtrip
found 5 hours ago
Select United flight, departing Sat, May 17 from Harrisburg to Great Falls, returning Sat, May 24, priced at $433 found 5 hours ago
Flights from Harrisburg (MDT) to Great Falls (GTF)
Origin airport
Harrisburg Intl.
Destination airport
Great Falls Intl.
Airlines serving
Alaska Airlines, Delta, United
Roundtrip price
$308
Distance
1779 mi

Harrisburg to Great Falls Flights

The cheapest times to fly from Harrisburg to Great Falls

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 Harrisburg to Great Falls are during the month of September. You can find some of the cheapest flights from Harrisburg to Great Falls with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Harrisburg to Great Falls

Sunday is one of the best days to book for cheap flights from Harrisburg to Great Falls: 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 Harrisburg to Great Falls

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 Harrisburg to Great Falls in 2025. You can also book with separate airlines for your outbound and return journeys, from $264 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 Harrisburg to Great Falls 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 Harrisburg to Great Falls 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.

 

Frequently asked questions

How much does a flight from Harrisburg Intl. Airport (MDT) to Great Falls Intl. Airport (GTF) cost?
Discover the latest flight deals from MDT to GTF by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from MDT to GTF?
The cheapest flights from MDT to GTF are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from MDT to GTF?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from MDT to GTF. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Harrisburg Intl. Airport (MDT) to Great Falls Intl. Airport (GTF)?
Nonstop flights from Harrisburg Intl. Airport (MDT) to Great Falls Intl. Airport (GTF) aren’t available daily, so you’ll need to take a flight with a layover. Explore your options with Expedia’s filters. Enter your dates and pick either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from MDT to GTF?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on a number of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Harrisburg Intl. Airport (MDT) to Great Falls Intl. Airport (GTF)?
To touch down at Great Falls Intl. Airport (GTF) on schedule, opt for a flight that leaves Harrisburg Intl. Airport (MDT) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Harrisburg Intl. Airport (MDT) to Great Falls Intl. Airport (GTF) last-minute?
Last-minute bookings from MDT to GTF are generally more expensive. To secure the best rates, start searching for flights as early as possible. That said, if your travel plans are flexible, you may find a cheap fare right before your trip.
Is it cheaper to book a MDT to GTF flight and hotel package?
Securing a MDT to GTF flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Select from our extensive range of stays and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Harrisburg Intl. Airport (MDT) to Great Falls Intl. Airport (GTF)?
In most cases, you can cancel or modify your MDT to GTF flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline’s policies and fees on flight changes, or if you need further information, go to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.