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$84+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — JAX
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Jacksonville are usually found in July or March, booked 20 days in advance, depart on a Friday or Saturday and return on a Sunday

Cheap 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 July 31, 2025.

Round-trip from

$168
(Southwest)

One-way from

$84
(Southwest)

Popular in

December

Cheapest in

July

Average price

$207
From Key Largo to Jacksonville
Search Deals
One-way flight from Key Largo to Jacksonville
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 July 31, 2025.

This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/271:00 pmMIA - JAX
1 stop7h 00mSouthwest
Wed 9/311:10 amJAX - MIA
1 stop5h 30mSouthwest
Deal found 7/30$168
This Frontier deal was found by Cheapflights users on 7/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/17:25 amMIA - JAX
1 stop8h 13mFrontier
Sat 8/212:45 pmJAX - MIA
1 stop7h 53mFrontier
Deal found 7/30$208
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/308:38 amMIA - JAX
1 stop32h 29mAmerican Airlines
Sun 8/316:02 pmJAX - MIA
Nonstop1h 22mAmerican Airlines
Deal found 7/29$210

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 July 31, 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

Wed 8/27

1:00 pm-8:00 pm

1 stop7h 00m

Jacksonville

Wed 9/3

11:10 am-4:40 pm

1 stop5h 30m

$168

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 8/15

7:25 am-3:38 pm

1 stop8h 13m

Jacksonville

Sat 8/16

12:45 pm-8:38 pm

1 stop7h 53m

$208

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 8/30

8:38 am-5:07 pm

1 stop32h 29m

Jacksonville

Sun 8/31

6:02 pm-7:24 pm

Nonstop1h 22m

$210

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 9/10

2:50 pm-9:35 pm

1 stop6h 45m

$84

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Fri 8/8

7:25 am-3:38 pm

1 stop8h 13m

$109

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Sat 9/27

7:10 am-3:39 pm

1 stop8h 29m

$143

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 8/7

11:10 am-11:02 am

2 stops23h 52m

$179

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 9/10

1:35 pm-2:55 pm

Nonstop1h 20m

$206

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 July 25, 2025.

The best time to book flights from Key Largo to Jacksonville is 20 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, August is the cheapest month in which you can book a flight from Key Largo to Jacksonville (average of $278). Flying from Key Largo to Jacksonville in March is currently the most expensive (average of $365). 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 July 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Key Largo to Jacksonville as you normally would.

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 Friday evenings when fares are most often at their lowest. Monday afternoons 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 July 31, 2025.

The most flights from KE9 to JAX are scheduled on a Thursday (18 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (7 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 July 31, 2025.
Read reviews from past customers who have flown Southwest, Delta, and American Airlines 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.
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Frontier
5.9
Fair
3,238 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 12 inbound flights from Key Largo per day.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $84. Users have also found prices from $109 and $143 on Frontier and Delta, respectively.

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

    Consider Envoy Air (66%), American Airlines (60%) or Gulf Air (58%) 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 $405, our data indicates the cheapest price to be $118. The most popular route (Miami - Jacksonville), is priced around $174.

  • 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, August is the cheapest month in which you can book a flight from Key Largo to Jacksonville (average of $278). Flying from Key Largo to Jacksonville in March is currently the most expensive (average of $365). 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
Kingsland
Fernandina Beach
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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$76Average$180FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$140Average$423FlexibilityNo cancel feeOn-time71%
DeltaCheapest$146Average$270FlexibilityNo cancel feeOn-timeN/A

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