$149 Cheap Flights from Trenton (TTN) to Harrisburg (MDT)

View $149 flight on Mon, Oct 20, 2025Opens in a new window

Popular airlines from Trenton–Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT)

Cheap Flights from Trenton to Harrisburg (TTN-MDT)

Prices were available within the past 7 days and start at $149 for one-way flights and $374 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Dec 10 - Sat, Dec 13
TTN
Trenton
MDT
Harrisburg
$374 Roundtrip, found 1 day ago
$374
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Dec 10 from Trenton to Harrisburg, returning Sat, Dec 13, priced at $374 found 1 day ago
American Airlines
Fri, Mar 27 - Sat, Apr 4
TTN
Trenton
MDT
Harrisburg
$394 Roundtrip, found 13 hours ago
$394
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Fri, Mar 27 from Trenton to Harrisburg, returning Sat, Apr 4, priced at $394 found 13 hours ago
American Airlines
Fri, Sep 26 - Mon, Sep 29
TTN
Trenton
MDT
Harrisburg
$413 Roundtrip, found 2 days ago
$413
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Sep 26 from Trenton to Harrisburg, returning Mon, Sep 29, priced at $413 found 2 days ago
American Airlines
Wed, Dec 10 - Sat, Dec 13
TTN
Trenton
MDT
Harrisburg
$427 Roundtrip, found 1 day ago
$427
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Dec 10 from Trenton to Harrisburg, returning Sat, Dec 13, priced at $427 found 1 day ago
American Airlines
Fri, Mar 27 - Sat, Apr 4
TTN
Trenton
MDT
Harrisburg
$450 Roundtrip, found 13 hours ago
$450
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Fri, Mar 27 from Trenton to Harrisburg, returning Sat, Apr 4, priced at $450 found 13 hours ago
American Airlines
Fri, Sep 26 - Mon, Sep 29
TTN
Trenton
MDT
Harrisburg
$472 Roundtrip, found 2 days ago
$472
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Sep 26 from Trenton to Harrisburg, returning Mon, Sep 29, priced at $472 found 2 days ago
American Airlines
Fri, Sep 26 - Mon, Sep 29
TTN
Trenton
MDT
Harrisburg
$516 Roundtrip, found 2 days ago
$516
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Sep 26 from Trenton to Harrisburg, returning Mon, Sep 29, priced at $516 found 2 days ago
American Airlines
Wed, Dec 10 - Sat, Dec 13
TTN
Trenton
MDT
Harrisburg
$525 Roundtrip, found 1 day ago
$525
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Dec 10 from Trenton to Harrisburg, returning Sat, Dec 13, priced at $525 found 1 day ago
American Airlines
Wed, Dec 10 - Sat, Dec 13
TTN
Trenton
MDT
Harrisburg
$539 Roundtrip, found 1 day ago
$539
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Dec 10 from Trenton to Harrisburg, returning Sat, Dec 13, priced at $539 found 1 day ago
American Airlines
Fri, Mar 27 - Sat, Apr 4
TTN
Trenton
MDT
Harrisburg
$547 Roundtrip, found 13 hours ago
$547
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Fri, Mar 27 from Trenton to Harrisburg, returning Sat, Apr 4, priced at $547 found 13 hours ago
Flights from Trenton (TTN) to Harrisburg (MDT)
Origin airport
Mercer
Destination airport
Harrisburg Intl.
Airlines serving
American Airlines
Roundtrip price
$374
Distance
102 mi

Trenton to Harrisburg Flights

The cheapest times to fly from Trenton 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 Trenton to Harrisburg are during the month of December. You can find some of the cheapest flights from Trenton to Harrisburg with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Trenton to Harrisburg

Sunday is one of the best days to book for cheap flights from Trenton 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 Trenton 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 Trenton to Harrisburg in 2025. You can also book with separate airlines for your outbound and return journeys, from $149 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 Trenton 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 Trenton 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.

 

Frequently asked questions

How much does a flight from Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT) cost?
Secure a cheap one-way flight from $149 or cheap return flight from $374 from Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT)?
December is the most affordable month to fly from TTN to MDT. Traveling during an off-peak travel window is often the key to finding better deals on flights.
What is the cheapest airline that flies from Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest TTN to MDT flight.
How many flights per day from Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT)?
Direct flights from Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from TTN to MDT?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can change based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT)?
To avoid potential delays on the Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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 Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT) last-minute?
Holding off until just before your trip to book a ticket from TTN to MDT often results in higher prices. While you may come across some last-minute offers, there's no guarantee. Keep your travel schedule open to maximize your chances of scoring a bargain.
Is it cheaper to book a TTN to MDT flight and hotel package?
Securing a TTN to MDT flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Select from our extensive range of accommodations and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Mercer Airport (TTN) to Harrisburg Intl. Airport (MDT)?
If you booked your TTN to MDT flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare 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, visit our Customer Service portal for further details.

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*Available to One Key members.