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$63+ Cheap flights from Key Largo, FL to Jacksonville (JAX)

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — JAX
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Jacksonville are usually found in March or May, booked 64 days in advance, depart on a Friday or Wednesday and return on a Sunday

Cheap flight deals from Key Largo to Jacksonville

Cheapest flights from Key Largo to Jacksonville
Explore the most affordable flight options available from Key Largo to Jacksonville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/17. 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 12/259:59 pmMIA - JAX
1 stop18h 28mMultiple Airlines
Wed 12/315:29 pmJAX - MIA
1 stop19h 37mMultiple Airlines
Deal found 12/17$225
This Expedia deal was found by Cheapflights users on 12/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:30 amMIA - JAX
1 stop11h 04mFrontier
Sat 12/279:00 pmJAX - MIA
1 stop14h 49mFrontier
Deal found 12/15$232
This Expedia deal was found by Cheapflights users on 12/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:30 amMIA - JAX
1 stop11h 04mFrontier
Mon 12/299:00 pmJAX - MIA
1 stop9h 00mFrontier
Deal found 12/18$234
This Expedia deal was found by Cheapflights users on 12/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/225:30 amMIA - JAX
1 stop10h 57mFrontier
Fri 12/269:00 pmJAX - MIA
1 stop14h 49mFrontier
Deal found 12/17$283
This Trip.com deal was found by Cheapflights users on 12/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:05 amMIA - JAX
1 stop15h 00mFrontier
Mon 12/299:00 pmJAX - MIA
1 stop9h 00mFrontier
Deal found 12/17$287
This Kiwi.com deal was found by Cheapflights users on 12/17. 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 12/318:00 amMIA - JAX
1 stop8h 34mMultiple Airlines
Sun 1/49:31 pmJAX - MIA
2 stops24h 29mMultiple Airlines
Deal found 12/17$288
This Expedia deal was found by Cheapflights users on 12/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2611:05 pmMIA - JAX
1 stop21h 00mFrontier
Sun 12/289:00 pmJAX - MIA
1 stop9h 00mFrontier
Deal found 12/18$302
This Travelocity deal was found by Cheapflights users on 12/16. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/192:30 pmMIA - JAX
1 stop6h 50mFrontier
Sat 12/209:00 pmJAX - MIA
1 stop9h 00mFrontier
Deal found 12/16$303
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Mon 12/295:30 amMIA - JAX
1 stop10h 57mMultiple Airlines
Tue 12/309:29 pmJAX - MIA
1 stop15h 09mMultiple Airlines
Deal found 12/17$304
This Expedia deal was found by Cheapflights users on 12/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:21 pmMIA - JAX
1 stop6h 59mFrontier
Sat 12/279:00 pmJAX - MIA
1 stop9h 00mFrontier
Deal found 12/18$312

Find flight deals from Key Largo to Jacksonville

Keep the following information in mind while searching for Key Largo to Jacksonville flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$133
(Kiwi.com)

One-way from

$63
(Kiwi.com)

Popular in

September

Cheapest in

March

Average price

$553
Provider with most accurate pricing for Miami-Jacksonville flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Jacksonville flights.
Search Deals
From Key Largo to Jacksonville
Search Deals
One-way flight from Key Largo to Jacksonville
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Jacksonville 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 December 18, 2025.
Use the filters below to find and compare flights from Key Largo to Jacksonville that are best for you.

Fly from

Key Largo

Fly to

Jacksonville

Route

Depart

Return

Price

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 1/16

7:09 pm-7:22 pm

1 stop24h 13m

Jacksonville

Mon 1/19

8:54 am-11:27 pm

1 stop14h 33m

$154

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 1/17

7:00 am-7:22 pm

1 stop12h 22m

Jacksonville

Sun 1/18

4:13 pm-12:42 am

1 stop8h 29m

$175

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 1/23

12:11 pm-6:23 pm

1 stop6h 12m

Jacksonville

Sat 1/24

5:28 pm-12:47 am

1 stop7h 19m

$180

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 2/20

7:05 am-7:17 pm

1 stop12h 12m

Jacksonville

Mon 2/23

7:24 pm-12:16 pm

1 stop16h 52m

$186

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 1/16

8:51 pm-7:22 pm

2 stops22h 31m

Jacksonville

Mon 1/19

8:54 am-11:27 pm

1 stop14h 33m

$190

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 1/16

5:15 am-7:22 pm

1 stop14h 07m

Jacksonville

Sat 1/17

9:32 pm-12:56 pm

1 stop15h 24m

$190

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 1/15

10:19 am-8:52 pm

2 stops10h 33m

Jacksonville

Thu 1/22

5:51 pm-1:06 pm

1 stop19h 15m

$206

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 1/29

7:09 pm-6:23 pm

1 stop23h 14m

Jacksonville

Sun 2/1

8:56 pm-5:51 pm

1 stop20h 55m

$208

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 1/9

5:20 am-4:57 pm

1 stop11h 37m

Jacksonville

Sun 1/11

5:51 pm-11:56 am

2 stops18h 05m

$220

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 1/17

7:00 am-7:15 pm

1 stop12h 15m

Jacksonville

Sun 1/18

11:07 am-11:20 pm

1 stop12h 13m

$260

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 23 results
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Best time to book a flight from Key Largo to Jacksonville

Have a flexible travel schedule? Discover the best time to fly to Jacksonville from Key Largo 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 Key Largo to Jacksonville

How far ahead should I book a flight from Key Largo to Jacksonville?

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Jacksonville. Price data was last updated on December 12, 2025.

The best time to book flights from Key Largo to Jacksonville is 63 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Key Largo to Jacksonville?

Currently, February is the cheapest month in which you can book a flight from Key Largo to Jacksonville (average of $87). Flying from Key Largo to Jacksonville in September is currently the most expensive (average of $212). 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 KE9 to JAX?

Find hourly flight availability from Key Largo to Jacksonville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Key Largo to Jacksonville in the afternoon. If you’re flexible enough to do this you can expect to save up to 31% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Key Largo to Jacksonville?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Jacksonville. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Key Largo to Jacksonville flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Key Largo to Jacksonville

Explore weekly flight availability from Key Largo to Jacksonville. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 18, 2025.

The most flights from KE9 to JAX are scheduled on a Thursday (12 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (3 on average).

Reviews of airlines servicing Jacksonville

Get insights into the airlines that provide service to Jacksonville. 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 Jacksonville. Reviews last updated December 18, 2025.
Read reviews from past customers who have flown Delta, American Airlines, and JetBlue from Key Largo to Jacksonville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,010 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
7.9
Good
8,010 reviews
Delta
7.9
Good
8,010 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
11,058 reviews
Delta
7.9
Good
8,010 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
JetBlue
7.2
Good
2,895 reviews
Delta
7.9
Good
8,010 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Jacksonville. 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 into for flights to Jacksonville from Key Largo?

    Jacksonville (JAX), located 11.2 mi from the city center, is the airport you fly into when you book flights from Key Largo to Jacksonville. 3 airlines have flights to Jacksonville from Key Largo on a regular basis. Booking flights from Key Largo to Jacksonville should not be difficult; the airport handles an average of 7 inbound flights from Key Largo per day.

  • How long is the flight from Key Largo to Jacksonville?

    For as low as $154, Frontier can have you in Jacksonville from Key Largo in 24h 13m. Airlines will cover a distance of 335 mi.

  • What are the cheapest airlines to fly from Key Largo to Jacksonville one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $93. Users have also found prices from $98 and $130 on Southwest and Delta, respectively.

  • What are the most reliable airlines from Key Largo to Jacksonville?

    Consider Finnair (100%), Republic Airways (100%) or Gulf Air (86%) when booking your flight. These represent the most reliable airlines when flying from Key Largo to Jacksonville.

  • What are the cheapest flights from Key Largo to Jacksonville?

    Looking for the cheapest flight from Key Largo to Jacksonville? While on average our users pay $481, our data indicates the cheapest price to be $128. The most popular route (Miami - Jacksonville), is priced around $139.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Key Largo to Jacksonville 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 Key Largo to Jacksonville?

    Currently, February is the cheapest month in which you can book a flight from Key Largo to Jacksonville (average of $87). Flying from Key Largo to Jacksonville in September is currently the most expensive (average of $212). 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

Traveling to a place near Jacksonville?

Book flights to Jacksonville if you plan to visit one of these locations
Jacksonville Beach
Orange Park
Fernandina Beach
Kingsland
Waycross

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Top 3 airlines flying from Key Largo to Jacksonville

Discover the top 3 airlines that operate flights from Key Largo to Jacksonville. 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$127Average$184FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$140Average$398FlexibilityNo cancel feeOn-time71%
DeltaCheapest$156Average$302FlexibilityNo cancel feeOn-timeN/A

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