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Key Largo

$46+ Cheap flights from Atlanta (ATL) 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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — MIA
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Atlanta Hartsfield-Jackson to Key Largo are usually found in September or October, booked 30 days in advance, depart on a Sunday or Friday and return on a Saturday

Cheap flight deals from Atlanta to Key Largo

Keep the following information in mind while searching for Atlanta to Key Largo flight deals. Data was last updated September 15, 2025.

Round-trip from

$80
(Frontier)

One-way from

$46
(Frontier)

Popular in

December

Cheapest in

September

Average price

$150
From Atlanta Hartsfield-Jackson to Key Largo
Search Deals
One-way flight from Atlanta Hartsfield-Jackson to Key Largo
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Atlanta to Key Largo

Cheapest flights from Atlanta to Key Largo
Explore the most affordable flight options available from Atlanta to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Frontier deal was found by Cheapflights users on 9/14. 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.
Tue 9/303:12 pmATL - MIA
Nonstop2h 03mFrontier
Fri 10/36:59 pmMIA - ATL
Nonstop2h 19mFrontier
Deal found 9/14$80
This Frontier deal was found by Cheapflights users on 9/14. 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.
Mon 11/1010:38 pmATL - MIA
Nonstop1h 56mFrontier
Sun 11/165:01 amMIA - ATL
Nonstop2h 12mFrontier
Deal found 9/14$81
This Frontier deal was found by Cheapflights users on 9/14. 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 10/1610:38 pmATL - MIA
Nonstop1h 56mFrontier
Sun 10/195:15 amMIA - ATL
Nonstop2h 12mFrontier
Deal found 9/14$82
This Priceline deal was found by Cheapflights users on 9/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/43:42 pmATL - MIA
Nonstop2h 00mMultiple Airlines
Sun 10/125:15 amMIA - ATL
Nonstop2h 12mMultiple Airlines
Deal found 9/13$83
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1310:38 pmATL - MIA
Nonstop1h 56mFrontier
Fri 10/175:15 amMIA - ATL
Nonstop2h 12mFrontier
Deal found 9/14$84
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/279:20 amATL - MIA
Nonstop2h 03mFrontier
Fri 10/36:59 pmMIA - ATL
Nonstop2h 19mFrontier
Deal found 9/13$85
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:30 amATL - MIA
Nonstop1h 59mMultiple Airlines
Sun 10/510:29 amMIA - ATL
Nonstop1h 58mMultiple Airlines
Deal found 9/15$86
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Sat 10/43:42 pmATL - MIA
Nonstop2h 00mMultiple Airlines
Mon 10/69:28 amMIA - ATL
Nonstop2h 08mMultiple Airlines
Deal found 9/13$87
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:14 amATL - MIA
Nonstop1h 57mFrontier
Fri 11/145:01 amMIA - ATL
Nonstop2h 12mFrontier
Deal found 9/14$88
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/119:27 pmATL - MIA
Nonstop1h 56mFrontier
Sun 10/125:15 amMIA - ATL
Nonstop2h 12mFrontier
Deal found 9/15$89
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/288:37 amATL - MIA
Nonstop2h 03mFrontier
Wed 10/16:57 pmMIA - ATL
Nonstop2h 19mFrontier
Deal found 9/14$90
This Frontier deal was found by Cheapflights users on 9/13. 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.
Sun 9/288:37 amATL - MIA
Nonstop2h 03mFrontier
Fri 10/39:28 amMIA - ATL
Nonstop2h 08mFrontier
Deal found 9/13$91

Cheapflights Fare Finder

 
Customize your flight search to find flights from Atlanta 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 September 15, 2025.
Use the filters below to find and compare flights from Atlanta to Key Largo that are best for you.

Fly from

Atlanta

Fly to

Key Largo

Route

Depart

Return

Price

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Tue 10/21

2:20 pm-8:35 pm

1 stop6h 15m

Miami

Wed 10/22

7:55 am-3:00 pm

1 stop7h 05m

$151

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Mon 12/8

6:25 pm-9:50 pm

1 stop3h 25m

Miami

Fri 12/12

6:55 am-10:30 am

1 stop3h 35m

$154

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Thu 11/13

4:35 pm-11:45 pm

1 stop7h 10m

Miami

Tue 11/18

6:55 am-4:20 pm

2 stops9h 25m

$156

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Mon 10/20

6:35 pm-10:05 pm

1 stop3h 30m

Miami

Fri 10/24

7:05 am-7:00 pm

2 stops11h 55m

$156

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Tue 11/11

8:20 am-12:05 pm

1 stop3h 45m

Miami

Tue 11/18

6:55 am-2:20 pm

2 stops7h 25m

$156

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Wed 10/29

12:35 pm-9:55 pm

1 stop9h 20m

Miami

Wed 11/12

9:30 am-5:35 pm

1 stop8h 05m

$156

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Wed 12/3

8:20 am-12:05 pm

1 stop3h 45m

Miami

Sat 12/6

6:25 am-2:00 pm

2 stops7h 35m

$156

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Fri 11/28

10:55 pm-12:48 am

Nonstop1h 53m

Miami

Tue 12/2

6:30 pm-8:45 pm

Nonstop2h 15m

$167

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Mon 11/24

6:55 pm-8:46 pm

Nonstop1h 51m

Miami

Fri 11/28

6:00 am-8:04 am

Nonstop2h 04m

$167

AtlantaMiami

ATL - MIA

ATLMIA

Atlanta Hartsfield-Jackson

Tue 11/25

12:45 pm-2:35 pm

Nonstop1h 50m

Miami

Fri 11/28

6:00 am-8:04 am

Nonstop2h 04m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 22 results
1
2
3

Best time to book a flight from Atlanta to Key Largo

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

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

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

The price you pay for your flight from Atlanta to Key Largo may vary depending on when you book. For the best chance of a lower fare, look to book 30 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from Atlanta to Key Largo (average of $232). Flying from Atlanta to Key Largo in March is currently the most expensive (average of $289). 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 ATL to KE9?

Find hourly flight availability from Atlanta 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 September 15, 2025.

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

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

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

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

Weekly flight availability from Atlanta to Key Largo

Explore weekly flight availability from Atlanta to Key Largo. 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 September 15, 2025.

The most flights from ATL to KE9 are scheduled on a Friday (60 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (32 on average).

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 September 15, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and American Airlines from Atlanta 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.
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,954 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,015 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Atlanta 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 Atlanta to Key Largo?

    For a flight from Atlanta to Key Largo, you will be flying from Hartsfield-Jackson. Atlanta Hartsfield-Jackson (ATL) is just 8.2 mi from the center of the city. Hartsfield-Jackson is the only Atlanta airport and it handles 47 outbound flights to Key Largo per day. 6 airlines have flights to Key Largo from Atlanta Hartsfield-Jackson on a regular basis.

  • How popular is this Atlanta to Key Largo flight route?

    This flight path from Atlanta Hartsfield-Jackson to Key Largo was viewed by 430 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Airlines like Southwest fly from Atlanta to Key Largo in about 6h 15m. The time it takes to get you to your destination can typically vary by up to . There are 596 mi between Atlanta and Key Largo.

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

    No one likes to see their flight delayed. When booking a flight from Atlanta to Key Largo consider choosing Envoy Air (71%), American Airlines (70%) or Iberia (63%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $44. While the most popular route (Atlanta Hartsfield-Jackson - Miami) can be booked for $73 on average, our data indicates $582 when flying from Atlanta to Key Largo.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Atlanta to Key Largo (average of $232). Flying from Atlanta to Key Largo in March is currently the most expensive (average of $289). 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

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Top 6 airlines flying from Atlanta to Key Largo

Discover the top 6 airlines that operate flights from Atlanta 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$135FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$62Average$139FlexibilityNo cancel feeOn-time65%
DeltaCheapest$118Average$329FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$167Average$201FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$172Average$361FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$175Average$305FlexibilityNo cancel feeOn-time63%

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