$691 Cheap Flights from Trenton (TTN) to Kailua-Kona (KOA)

View $691 flight on Wed, Dec 24, 2025Opens in a new window

Popular airlines from Trenton–Mercer Airport (TTN) to Kona Intl. Airport (KOA)

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Cheap Flights from Trenton to Kailua-Kona (TTN-KOA)

Prices were available within the past 7 days and start at $691 for one-way flights and $1,158 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Jan 7 - Sun, Jan 11
TTN
Trenton
KOA
Kona Coast
$1,158 Roundtrip, just found
$1,158
Roundtrip
just found
Select American Airlines flight, departing Wed, Jan 7 from Trenton to Kona Coast, returning Sun, Jan 11, priced at $1,158 just found
American Airlines
Wed, Jan 7 - Sun, Jan 11
TTN
Trenton
KOA
Kona Coast
$1,225 Roundtrip, just found
$1,225
Roundtrip
just found
Select American Airlines flight, departing Wed, Jan 7 from Trenton to Kona Coast, returning Sun, Jan 11, priced at $1,225 just found
American Airlines
Wed, Jan 7 - Sun, Jan 11
TTN
Trenton
KOA
Kona Coast
$1,258 Roundtrip, just found
$1,258
Roundtrip
just found
Select American Airlines flight, departing Wed, Jan 7 from Trenton to Kona Coast, returning Sun, Jan 11, priced at $1,258 just found
American Airlines
Wed, Jan 7 - Sun, Jan 11
TTN
Trenton
KOA
Kona Coast
$1,332 Roundtrip, just found
$1,332
Roundtrip
just found
Select American Airlines flight, departing Wed, Jan 7 from Trenton to Kona Coast, returning Sun, Jan 11, priced at $1,332 just found
American Airlines
Wed, Jan 7 - Sun, Jan 11
TTN
Trenton
KOA
Kona Coast
$1,405 Roundtrip, just found
$1,405
Roundtrip
just found
Select American Airlines flight, departing Wed, Jan 7 from Trenton to Kona Coast, returning Sun, Jan 11, priced at $1,405 just found
American Airlines
Wed, Jan 7 - Sun, Jan 11
TTN
Trenton
KOA
Kona Coast
$1,430 Roundtrip, just found
$1,430
Roundtrip
just found
Select American Airlines flight, departing Wed, Jan 7 from Trenton to Kona Coast, returning Sun, Jan 11, priced at $1,430 just found
American Airlines
Wed, Jan 7 - Sun, Jan 11
TTN
Trenton
KOA
Kona Coast
$1,608 Roundtrip, just found
$1,608
Roundtrip
just found
Select American Airlines flight, departing Wed, Jan 7 from Trenton to Kona Coast, returning Sun, Jan 11, priced at $1,608 just found
American Airlines
Wed, Jan 7 - Sun, Jan 11
TTN
Trenton
KOA
Kona Coast
$1,650 Roundtrip, just found
$1,650
Roundtrip
just found
Select American Airlines flight, departing Wed, Jan 7 from Trenton to Kona Coast, returning Sun, Jan 11, priced at $1,650 just found
Flights from Trenton (TTN) to Kailua-Kona (KOA)
Origin airport
Mercer
Destination airport
Kona Intl.
Roundtrip price
$1,158
Distance
4895 mi

Trenton to Kailua-Kona Flights

The cheapest times to fly from Trenton to Kailua-Kona

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

 

The best time to book a flight from Trenton to Kailua-Kona

Sunday is one of the best days to book for cheap flights from Trenton to Kailua-Kona: 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 Kailua-Kona

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 Kailua-Kona in 2025. You can also book with separate airlines for your outbound and return journeys, from $691 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 Kailua-Kona 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 Kailua-Kona 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 Kona Intl. Airport (KOA) cost?
Grab a cheap one-way flight from $691 or cheap return flight from $1,158 from Mercer Airport (TTN) to Kona Intl. Airport (KOA) 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 Kona Intl. Airport (KOA)?
January is the most affordable month to fly from TTN to KOA. Avoiding peak travel times is often the key to scoring lower fares.
What is the cheapest airline that flies from Mercer Airport (TTN) to Kona Intl. Airport (KOA)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from TTN to KOA. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from Mercer Airport (TTN) to Kona Intl. Airport (KOA)?
There are no daily direct flights departing from Mercer Airport (TTN) to Kona Intl. Airport (KOA). But you can book flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from TTN to KOA?
Typically you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can change based on the airline, season 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 Kona Intl. Airport (KOA)?
Opt for a flight from Mercer Airport (TTN) to Kona Intl. Airport (KOA) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**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 Kona Intl. Airport (KOA) last-minute?
Last-minute fares from TTN to KOA are usually more expensive. For the cheapest rates, start looking for flights as soon as possible. That said, if you can play around with your travel dates, it's possible to find a cheap fare just before your departure.
Is it cheaper to book a TTN to KOA flight and hotel package?
Securing a TTN to KOA flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our wide range of accommodations and then add car rentals, activities and flights 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 Kona Intl. Airport (KOA)?
Typically, you can cancel or modify your TTN to KOA flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you want further details, go to our Customer Service portal.

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*Available to One Key members.