HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Key Largo

$109+ Cheap flights from Trenton, NJ (TTN) to Key Largo, FL

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — MIA
Mar 29 — Apr 51
Sun 3/29
Sun 4/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Trenton to Key Largo with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Trenton to Key Largo

One-way flights from Trenton to Key Largo
Search for one-way flight options from Trenton to Key Largo. Find affordable one-way fares based on user searches. Data last updated February 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/176:00 am
TTN
-
MIA
2 stops31h 06m
Frontier
Deal found 2/25$109
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/127:15 pm
TTN
-
MIA
2 stops29h 32m
Multiple Airlines
Deal found 2/24$122
This Kiwi.com deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/57:15 pm
TTN
-
MIA
2 stops39h 07m
Multiple Airlines
Deal found 2/26$127
This Kiwi.com deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/197:15 pm
TTN
-
MIA
2 stops29h 32m
Multiple Airlines
Deal found 2/26$163
This Kiwi.com deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/57:25 pm
TTN
-
MIA
2 stops43h 53m
Multiple Airlines
Deal found 2/25$164
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:00 am
TTN
-
MIA
2 stops18h 47m
Frontier
Deal found 2/24$178
This Kiwi.com deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/139:59 pm
TTN
-
MIA
2 stops22h 08m
Multiple Airlines
Deal found 2/25$187
This Kiwi.com deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/176:00 am
TTN
-
MIA
3 stops13h 16m
Multiple Airlines
Deal found 2/25$196
This Kiwi.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/267:15 pm
TTN
-
MIA
2 stops24h 52m
Multiple Airlines
Deal found 2/23$213
This Kiwi.com deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/206:00 am
TTN
-
MIA
2 stops42h 47m
Frontier
Deal found 2/25$221

Find flight deals from Trenton to Key Largo

Keep the following information in mind while searching for Trenton to Key Largo flight deals. Data was last updated February 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

November

Cheapest in

February

Average price

$102
Provider with most accurate pricing for New York (NYC)-Miami flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Miami flights.
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Trenton to Key Largo that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 27, 2026.
Use the filters below to find and compare flights from Trenton to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Tue 3/17

6:00 am-1:06 pm

2 stops31h 06m

$109

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Sun 4/5

7:15 pm-10:22 am

2 stops39h 07m

$127

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Fri 3/20

11:48 am-12:47 am

2 stops36h 59m

$163

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Thu 3/19

7:15 pm-12:47 am

2 stops29h 32m

$163

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Thu 3/26

7:15 pm-8:07 pm

2 stops24h 52m

$213

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Fri 3/20

6:00 am-12:47 am

2 stops42h 47m

$221

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Fri 3/13

9:59 pm-2:09 am

3 stops28h 10m

$242

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Thu 3/5

7:25 pm-4:23 pm

3 stops20h 58m

$280

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Fri 7/24

7:15 pm-11:53 pm

2 stops28h 38m

$300

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/25

Sorted by cheapest first

Best time to book a flight from Trenton to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Trenton with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Trenton to Key Largo

What is the cheapest month to book a flight from Trenton, New Jersey to Key Largo?

Currently, January is the cheapest month in which you can book a flight from Trenton, New Jersey to Key Largo (average of $24). Flying from Trenton, New Jersey to Key Largo in July is currently the most expensive (average of $85). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Key Largo. Reviews last updated February 27, 2026.
Get a feel of what it's like to fly with Frontier from Trenton to Key Largo by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Frontier
5.7
Fair
3,041 reviews

Entertainment

4.3

Food

4.6

Boarding

6.0

Comfort

5.5

Overall

5.7

Crew

6.6

Reviews

1 / 20
2.0
Mediocre

Shri,Feb 2026

MCO - DEN

Plane was dirty, food strewn all over the floor. The flight attendant was dozing in her chair for most of the flight. Even the announcements sounded so unenthusiastic. The seats are old and dirty, the seat belts look worn out.
Frontier
5.7
Fair
3,041 reviews
Frontier
5.7
Fair
3,041 reviews

Entertainment

4.3

Food

4.6

Boarding

6.0

Comfort

5.5

Overall

5.7

Crew

6.6

Reviews

1 / 20
2.0
Mediocre

Shri,Feb 2026

MCO - DEN

Plane was dirty, food strewn all over the floor. The flight attendant was dozing in her chair for most of the flight. Even the announcements sounded so unenthusiastic. The seats are old and dirty, the seat belts look worn out.

Related info for your journey

Find useful and relevant information for your journey from Trenton to Key Largo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Trenton to Key Largo?

    Most people fly from Trenton-Mercer (TTN) if they book a flight from Trenton to Key Largo. On average, Trenton-Mercer has 0 outbound flights to Key Largo per day from 3 airlines. Trenton-Mercer is conveniently located just 4.8 mi from Trenton’s city center.

  • Can I find deals for flights from Trenton to Key Largo that include hotel bookings?

    Yes. In addition to deals on Trenton to Key Largo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Trenton to Key Largo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trenton to Key Largo.

  • Can I find deals for business class flights from Trenton to Key Largo?

    Yes. Cheapflights offers flight deals from Trenton to Key Largo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Trenton, New Jersey to Key Largo?

    Currently, January is the cheapest month in which you can book a flight from Trenton, New Jersey to Key Largo (average of $24). Flying from Trenton, New Jersey to Key Largo in July is currently the most expensive (average of $85). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Trenton to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Miami flights
Newark to Fort Lauderdale flights
Newark to Miami flights
LaGuardia to Miami flights
LaGuardia to Fort Lauderdale flights
John F Kennedy Intl to Fort Lauderdale flights
Newark to West Palm Beach flights
John F Kennedy Intl to Orlando flights
John F Kennedy Intl to West Palm Beach flights
Newark to Orlando flights
LaGuardia to Orlando flights
Newark to Tampa flights
John F Kennedy Intl to Tampa flights
LaGuardia to West Palm Beach flights
LaGuardia to Tampa flights
Philadelphia to Miami flights
Philadelphia to Orlando flights
Philadelphia to Fort Lauderdale flights
Philadelphia to Tampa flights
Newark to Fort Myers flights
John F Kennedy Intl to Fort Myers flights
John F Kennedy Intl to Sarasota flights
Atlantic City to Fort Lauderdale flights
Atlantic City to Tampa flights
LaGuardia to Fort Myers flights
Atlantic City to Orlando flights
Newark to Sarasota flights
LaGuardia to Sarasota flights
Atlantic City to West Palm Beach flights
John F Kennedy Intl to Jacksonville flights
Newark to Jacksonville flights
Trenton to Orlando flights
LaGuardia to Jacksonville flights
Philadelphia to Fort Myers flights
Newark to Key West flights
Philadelphia to West Palm Beach flights
John F Kennedy Intl to Key West flights
Philadelphia to Jacksonville flights
Trenton to Tampa flights
Philadelphia to Key West flights
Newark to Daytona Beach flights
John F Kennedy Intl to Daytona Beach flights
Trenton to Fort Lauderdale flights
LaGuardia to Pensacola flights
Atlantic City to Fort Myers flights
Philadelphia to Daytona Beach flights
LaGuardia to Panama City flights
Philadelphia to Sarasota flights
John F Kennedy Intl to Panama City flights

Top 3 airlines flying from Trenton to Key Largo

Discover the top 3 airlines that operate flights from Trenton to Key Largo. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$24Average$119FlexibilityNo cancel feeOn-time65%
FrontierCheapest$61Average$215FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$78Average$99FlexibilityNo cancel feeOn-time88%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.