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$99+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — JAX
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 81 days in advance, depart on a Friday or Wednesday and return on a Friday

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 June 12, 2025.

Round-trip from

$197
(American Airlines)

One-way from

$99
(American Airlines)

Popular in

December

Cheapest in

July

Average price

$312
From Key Largo to Jacksonville
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One-way flight from Key Largo to Jacksonville
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Highest demand for flights based on searches. 19% potential increase in price ($88 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/12. 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.
Fri 7/118:08 amMIA - JAX
Nonstop1h 20mAmerican Airlines
Mon 7/147:35 pmJAX - MIA
Nonstop1h 24mAmerican Airlines
Deal found 6/12$197
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/196:00 amMIA - JAX
1 stop4h 05mDelta
Thu 8/215:20 amJAX - MIA
1 stop4h 03mDelta
Deal found 6/10$217
This Frontier deal was found by Cheapflights users on 6/12. 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.
Thu 7/36:00 amMIA - JAX
1 stop12h 52mFrontier
Sun 7/67:49 pmJAX - MIA
1 stop24h 50mFrontier
Deal found 6/12$218
This Mytrip deal was found by Cheapflights users on 6/11. 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 7/3111:10 amMIA - JAX
2 stops23h 52mMultiple Airlines
Sun 8/39:44 amJAX - MIA
1 stop7h 09mMultiple Airlines
Deal found 6/11$235
This Southwest deal was found by Cheapflights users on 6/12. 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.
Tue 7/156:30 amMIA - JAX
2 stops11h 15mSouthwest
Tue 7/223:40 pmJAX - MIA
1 stop6h 15mSouthwest
Deal found 6/12$252
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1912:50 pmMIA - JAX
2 stops26h 36mUnited Airlines
Thu 8/217:00 amJAX - MIA
1 stop15h 15mUnited Airlines
Deal found 6/11$448

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 June 12, 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 7/11

5:19 pm-6:43 pm

Nonstop1h 24m

Jacksonville

Sun 7/13

6:05 am-7:23 am

Nonstop1h 18m

$197

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 8/19

6:00 am-10:05 am

1 stop4h 05m

Jacksonville

Thu 8/21

5:20 am-9:23 am

1 stop4h 03m

$217

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 7/3

6:00 am-6:52 pm

1 stop12h 52m

Jacksonville

Sun 7/6

7:49 pm-8:39 pm

1 stop24h 50m

$218

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 7/31

11:10 am-11:02 am

2 stops23h 52m

Jacksonville

Sun 8/3

9:44 am-4:53 pm

1 stop7h 09m

$235

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 7/15

6:30 am-5:45 pm

2 stops11h 15m

Jacksonville

Tue 7/22

3:40 pm-9:55 pm

1 stop6h 15m

$252

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 8/19

12:50 pm-3:26 pm

2 stops26h 36m

Jacksonville

Thu 8/21

7:00 am-10:15 pm

1 stop15h 15m

$448

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 8/6

10:30 pm-11:49 pm

Nonstop1h 19m

$99

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Wed 8/6

6:55 am-1:29 pm

1 stop6h 34m

$109

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Tue 7/8

12:45 pm-8:55 pm

2 stops8h 10m

$130

MiamiJacksonville

MIA - JAX

MIAJAX

Miami

Thu 7/31

11:10 am-11:02 am

2 stops23h 52m

$141

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 13 results
1
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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 June 9, 2025.

The best time to book flights from Key Largo to Jacksonville is 81 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 June 12, 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. 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 June 12, 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 (8 on average).

Rainfall in Jacksonville by month

Plan your trip to Jacksonville by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Jacksonville ranges from 2.1 - 8.2 inches per month. September is typically the wettest month, when rainfall can reach 8.2 in. November is typically the driest time to visit Jacksonville when rainfall is around 2.1 in.

Temperature in Jacksonville by month

Plan your trip to Jacksonville by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Jacksonville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
Read through reviews of airlines operating flights from Key Largo to Jacksonville, such as Southwest, Delta and United Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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.
Spirit Airlines
6.3
Okay
8,052 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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 American Airlines. According to our data, you can fly for as low as $99. Users have also found prices from $109 and $130 on Delta and Southwest, respectively.

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

    Consider Envoy Air (95%), Gulf Air (79%) or British Airways (73%) 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 $432, our data indicates the cheapest price to be $118. The most popular route (Miami - Jacksonville), is priced around $217.

  • 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 Key Largo?

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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$76Average$176FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$130Average$399FlexibilityNo cancel feeOn-time71%
DeltaCheapest$146Average$288FlexibilityNo cancel feeOn-timeN/A

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