Cheap Flights from Trenton (TTN) to Gaithersburg (GAI)

Popular airlines from Trenton–Mercer Airport (TTN) to Gaithersburg, MD (GAI-Montgomery County Airpark)

Alternative airports near Gaithersburg

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

Select flight to Ronald Reagan Washington National DCA. Cheapest option available. Average driving time to city center is 38 minutes. Flights from $207
DCA
Ronald Reagan Washington National
Cheapest
Average driving time to city center38 min
Flights from $207

Frequently asked questions

How much does a flight from Mercer Airport (TTN) to Gaithersburg, MD (GAI-Montgomery County Airpark) cost?
Secure a cheap one-way flight or cheap return flight from Mercer Airport (TTN) to Gaithersburg, MD (GAI-Montgomery County Airpark) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Mercer Airport (TTN) to Gaithersburg, MD (GAI-Montgomery County Airpark)?
Traveling in is a great way to save, as it's the cheapest month for flights between TTN and GAI. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Mercer Airport (TTN) to Gaithersburg, MD (GAI-Montgomery County Airpark)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest TTN to GAI flight.
How many flights per day from Mercer Airport (TTN) to Gaithersburg, MD (GAI-Montgomery County Airpark)?
You'll need to take a flight with a layover when traveling from Mercer Airport (TTN) to Gaithersburg, MD (GAI-Montgomery County Airpark). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from TTN to GAI?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*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 Gaithersburg, MD (GAI-Montgomery County Airpark)?
Choose a flight from Mercer Airport (TTN) to Gaithersburg, MD (GAI-Montgomery County Airpark) that leaves before 3 PM to reduce the risk of cancellations and delays. Later departures have a 22% higher chance of being canceled, on average.**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 Gaithersburg, MD (GAI-Montgomery County Airpark) last-minute?
Holding off until just before your departure to book a ticket from TTN to GAI generally means paying more. Although you may find some last-minute deals, they're not always guaranteed. Be flexible with your travel plans for the best chance of snagging a bargain.
Is it cheaper to book a TTN to GAI flight and hotel package?
You can save money by securing a TTN to GAI flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After choosing your ideal accommodations and flights, you can add extras such as activities, tours and car rentals.
Can I cancel or change the date of my flight from Mercer Airport (TTN) to Gaithersburg, MD (GAI-Montgomery County Airpark)?
If you booked your TTN to GAI flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

Travel information

Origin airport
Mercer
Destination airport
Montgomery County Airpark
Distance
146 mi

Book with confidence

Trenton to Gaithersburg Flights

The cheapest times to fly from Trenton to Gaithersburg

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

 

The best time to book a flight from Trenton to Gaithersburg

Sunday is one of the best days to book for cheap flights from Trenton to Gaithersburg: 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 Gaithersburg

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 Gaithersburg in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Gaithersburg 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 Gaithersburg 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.

 

Trenton to Gaithersburg Flights

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*Available to One Key members.