$285 Cheap Flights from Trenton (TTN) to Rapid City (RAP)

View $285 flight on Sat, Jun 13, 2026Opens in a new window

Popular airlines from Trenton–Mercer Airport (TTN) to Rapid City Regional Airport (RAP)

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Cheap Flights from Trenton to Rapid City (TTN-RAP)

Prices were available within the past 7 days and start at $285 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Trenton (TTN) to Rapid City (RAP)
Origin airport
Mercer
Destination airport
Rapid City Regional
Distance
1461 mi

Trenton to Rapid City Flights

The cheapest times to fly from Trenton to Rapid City

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

 

The best time to book a flight from Trenton to Rapid City

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

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 Rapid City in 2025. You can also book with separate airlines for your outbound and return journeys, from $285 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 Rapid City 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 Rapid City 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 Rapid City Regional Airport (RAP) cost?
Secure a cheap one-way flight from $285 or cheap return flight from Mercer Airport (TTN) to Rapid City Regional Airport (RAP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Mercer Airport (TTN) to Rapid City Regional Airport (RAP)?
Flying in may help you find better deals, as it's the cheapest month for flights between TTN and RAP. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Mercer Airport (TTN) to Rapid City Regional Airport (RAP)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll fly you from TTN to RAP. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Mercer Airport (TTN) to Rapid City Regional Airport (RAP)?
Direct flights from Mercer Airport (TTN) to Rapid City Regional Airport (RAP) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from TTN to RAP?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*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 Rapid City Regional Airport (RAP)?
To land at Rapid City Regional Airport (RAP) on schedule, select a flight that leaves Mercer Airport (TTN) before 3 PM. The likelihood 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 Mercer Airport (TTN) to Rapid City Regional Airport (RAP) last-minute?
Waiting until just before your trip to book your flight from TTN to RAP often results in higher prices. Although you may find some last-minute discounts, there's no guarantee. Allow some flexibility in your schedule to maximize your chances of snagging a bargain.
Is it cheaper to book a TTN to RAP flight and hotel package?
You can save money by booking a TTN to RAP flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. Once you've selected your ideal accommodations and flights, consider adding extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Mercer Airport (TTN) to Rapid City Regional Airport (RAP)?
In most cases, you're able to cancel or reschedule your TTN to RAP flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you need more details, go to our Customer Service portal.

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*Available to One Key members.