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Key Largo

$84+ 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — MIA
Dec 29 — Jan 51
Mon 12/29
Mon 1/5
1 adult, Economy
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Find flight deals from Trenton to Key Largo

Best flights from Trenton to Key Largo
Discover carefully curated flight deals from Trenton to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 29, 2025.

This Mytrip deal was found by Cheapflights users on 11/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/197:15 pmTTN - MIA
2 stops25h 28mMultiple Airlines
Sat 3/289:45 pmMIA - TTN
2 stops20h 40mMultiple Airlines
Deal found 11/28$539

Cheap 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 November 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$539
(Mytrip)

One-way from

$84
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$296
Provider with most accurate pricing for New York (NYC)-Miami flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-Miami flights.
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From Trenton-Mercer to Key Largo
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One-way flight from Trenton-Mercer to Key Largo
Search Deals
Highest demand for flights based on searches. 36% potential increase in price ($133 potential increase over avg. RT price).
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Cheapest flight prices on average. 18% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 November 29, 2025.
Use the filters below to find and compare flights from Trenton to Key Largo that are best for you.

Fly from

Trenton

Fly to

Key Largo

Route

Depart

Return

Price

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Thu 3/19

7:15 pm-8:43 pm

2 stops25h 28m

Miami

Sat 3/28

9:45 pm-6:25 pm

2 stops20h 40m

$539

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Mon 1/26

8:27 pm-12:47 pm

2 stops16h 20m

$84

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Mon 1/19

9:59 pm-12:47 pm

2 stops38h 48m

$100

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Sat 12/6

6:10 am-2:49 pm

2 stops32h 39m

$103

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Sun 1/18

7:00 am-12:28 am

2 stops17h 28m

$115

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Sun 1/18

9:59 pm-12:47 pm

3 stops38h 48m

$137

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Sat 1/10

8:00 am-12:46 am

2 stops16h 46m

$142

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Mon 1/26

8:27 pm-11:59 pm

3 stops27h 32m

$150

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Mon 1/19

7:00 am-11:56 am

3 stops28h 56m

$154

TrentonMiami

TTN - MIA

TTNMIA

Trenton-Mercer

Sat 12/6

6:10 am-8:23 am

3 stops26h 13m

$164

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/28

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, December is the cheapest month in which you can book a flight from Trenton, New Jersey to Key Largo (average of $26). 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.

What is the cheapest time of day to fly from TTN to KE9?

Find hourly flight availability from Trenton to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 29, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 56% on flights from Trenton, New Jersey to Key Largo by exploring options for tickets at noon.

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 November 29, 2025.
Get a feel of what it's like to fly with Spirit Airlines and 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.
Spirit Airlines
6.3
Okay
8,160 reviews

Food

5.1

Overall

6.3

Entertainment

5.0

Comfort

5.9

Boarding

6.6

Crew

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2025

PNS - MCO

Bad experience. Unhappy with the changing of flight times and one particular flight attendant (Bartholomew) on our flight from Orlando to Detroit. Traveling with a large family of 7, including our 18 month old, can be arduous but when the airline changes your flight time from landing at 9:30 pm to landing after midnight, this becomes much more difficult. When our 18 month old was predictably over tired and fussy, my wife and I tried to move to an open row so we can console her more effectively. The flight attendent rebuked us and said we could not sit in an exit row. We were not planning on sitting there for more than a few minutes but just to have space to console our screaming 18 month old. Spirit did not allow for a family friendly trip. Likely will be choosing a different airline next time.
Spirit Airlines
6.3
Okay
8,160 reviews
Spirit Airlines
6.3
Okay
8,160 reviews

Food

5.1

Overall

6.3

Entertainment

5.0

Comfort

5.9

Boarding

6.6

Crew

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2025

PNS - MCO

Bad experience. Unhappy with the changing of flight times and one particular flight attendant (Bartholomew) on our flight from Orlando to Detroit. Traveling with a large family of 7, including our 18 month old, can be arduous but when the airline changes your flight time from landing at 9:30 pm to landing after midnight, this becomes much more difficult. When our 18 month old was predictably over tired and fussy, my wife and I tried to move to an open row so we can console her more effectively. The flight attendent rebuked us and said we could not sit in an exit row. We were not planning on sitting there for more than a few minutes but just to have space to console our screaming 18 month old. Spirit did not allow for a family friendly trip. Likely will be choosing a different airline next time.
Frontier
5.8
Fair
3,100 reviews
Spirit Airlines
6.3
Okay
8,160 reviews

Food

5.1

Overall

6.3

Entertainment

5.0

Comfort

5.9

Boarding

6.6

Crew

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2025

PNS - MCO

Bad experience. Unhappy with the changing of flight times and one particular flight attendant (Bartholomew) on our flight from Orlando to Detroit. Traveling with a large family of 7, including our 18 month old, can be arduous but when the airline changes your flight time from landing at 9:30 pm to landing after midnight, this becomes much more difficult. When our 18 month old was predictably over tired and fussy, my wife and I tried to move to an open row so we can console her more effectively. The flight attendent rebuked us and said we could not sit in an exit row. We were not planning on sitting there for more than a few minutes but just to have space to console our screaming 18 month old. Spirit did not allow for a family friendly trip. Likely will be choosing a different airline next time.

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 2 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, December is the cheapest month in which you can book a flight from Trenton, New Jersey to Key Largo (average of $26). 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.

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Top 2 airlines flying from Trenton to Key Largo

Discover the top 2 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 November 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$44Average$195FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$57Average$130FlexibilityNo cancel feeOn-time65%

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