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Key Largo

$103+ Cheap flights from O'Hare Intl (ORD) 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MIA
Jul 26 — Aug 21
Sun 7/26
Sun 8/2
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Key Largo are usually found in September or January, booked 41 days in advance, depart on a Monday or Saturday and return on a Friday

Cheap flight deals from O'Hare Intl to Key Largo

Cheapest flights from O'Hare Intl to Key Largo
Explore the most affordable flight options available from O'Hare Intl to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2026.

This United Airlines deal was found by Cheapflights users on 6/22. 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.
Sat 8/16:05 pm
ORD
-
MIA
Nonstop3h 22m
United Airlines
Tue 8/48:48 am
MIA
-
ORD
1 stop7h 05m
United Airlines
Deal found 6/22$225
This Cheapflightsfares deal was found by Cheapflights users on 6/21. 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.
Wed 7/159:57 pm
ORD
-
MIA
1 stop30h 54m
Frontier
Tue 7/2110:15 pm
MIA
-
ORD
1 stop32h 22m
Frontier
Deal found 6/21$228
This United Airlines deal was found by Cheapflights users on 6/21. 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 7/146:00 am
ORD
-
MIA
1 stop9h 16m
United Airlines
Wed 7/2212:30 pm
MIA
-
ORD
Nonstop3h 43m
United Airlines
Deal found 6/21$231
This Cheapflightsfares deal was found by Cheapflights users on 6/25. 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.
Tue 8/119:57 pm
ORD
-
MIA
1 stop30h 54m
Frontier
Sat 8/156:00 am
MIA
-
ORD
1 stop15h 52m
Frontier
Deal found 6/25$232
This United Airlines deal was found by Cheapflights users on 6/22. 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 8/1810:32 am
ORD
-
MIA
Nonstop3h 22m
United Airlines
Sat 8/2211:30 am
MIA
-
ORD
1 stop9h 35m
United Airlines
Deal found 6/22$233
This Frontier deal was found by Cheapflights users on 6/24. 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 10/249:33 pm
ORD
-
MIA
1 stop10h 25m
Frontier
Tue 10/276:45 am
MIA
-
ORD
1 stop6h 17m
Frontier
Deal found 6/24$234
This Kiwi.com deal was found by Cheapflights users on 6/23. 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.
Tue 7/147:05 am
ORD
-
MIA
1 stop5h 48m
Frontier
Tue 7/149:33 pm
MIA
-
ORD
1 stop26h 54m
Frontier
Deal found 6/23$235
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/277:05 am
ORD
-
MIA
1 stop5h 48m
Frontier
Tue 8/1110:50 am
MIA
-
ORD
1 stop10h 03m
Frontier
Deal found 6/21$236
This American Airlines deal was found by Cheapflights users on 6/24. 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 12/127:07 pm
ORD
-
MIA
Nonstop3h 18m
American Airlines
Mon 12/148:35 pm
MIA
-
ORD
Nonstop3h 22m
American Airlines
Deal found 6/24$237
This Cheapflightsfares deal was found by Cheapflights users on 6/24. 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.
Fri 7/317:05 am
ORD
-
MIA
1 stop8h 28m
Frontier
Tue 8/46:00 am
MIA
-
ORD
1 stop15h 52m
Frontier
Deal found 6/24$238
This Frontier deal was found by Cheapflights users on 6/24. 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 11/56:50 am
ORD
-
MIA
1 stop11h 55m
Frontier
Wed 11/1110:28 am
MIA
-
ORD
1 stop10h 16m
Frontier
Deal found 6/24$239

Find flight deals from O'Hare Intl to Key Largo

Keep the following information in mind while searching for O'Hare Intl to Key Largo flight deals. Data was last updated June 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$225
(United Airlines)

One-way from

$103
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$372
Provider with most accurate pricing for Chicago (CHI)-Miami flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Miami flights.
Search Deals
From Chicago O'Hare Intl to Key Largo
Search Deals
One-way flight from Chicago O'Hare Intl to Key Largo
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl 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 June 26, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Tue 9/15

7:30 am-11:54 am

Nonstop3h 24m

Miami

Thu 9/24

12:29 pm-3:00 pm

Nonstop3h 31m

$277

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 7/25

6:05 pm-10:27 pm

Nonstop3h 22m

Miami

Mon 7/27

4:10 pm-6:53 pm

Nonstop3h 43m

$277

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Wed 7/8

6:00 am-2:38 pm

1 stop7h 38m

Miami

Tue 7/21

5:32 pm-8:13 pm

Nonstop3h 41m

$284

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Wed 7/8

6:00 am-2:38 pm

1 stop7h 38m

Miami

Wed 7/15

4:10 pm-6:53 pm

Nonstop3h 43m

$284

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Wed 7/15

7:00 am-11:24 am

Nonstop3h 24m

Miami

Sat 7/18

6:30 am-2:51 pm

1 stop9h 21m

$321

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 7/4

7:00 am-11:24 am

Nonstop3h 24m

Miami

Tue 7/14

5:32 pm-8:13 pm

Nonstop3h 41m

$339

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 8/29

7:30 am-11:54 am

Nonstop3h 24m

Miami

Sat 9/5

12:17 pm-2:48 pm

Nonstop3h 31m

$339

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Tue 7/21

7:00 am-11:24 am

Nonstop3h 24m

Miami

Mon 7/27

4:10 pm-6:53 pm

Nonstop3h 43m

$367

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Thu 7/23

10:33 am-2:57 pm

Nonstop3h 24m

Miami

Thu 7/30

8:48 am-4:39 pm

1 stop8h 51m

$409

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Fri 7/31

10:33 am-2:57 pm

Nonstop3h 24m

Miami

Sun 8/2

5:40 pm-8:21 pm

Nonstop3h 41m

$427

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/24

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

Best time to book a flight from O'Hare Intl to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from O'Hare Intl 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 Chicago O'Hare Intl Airport to Key Largo

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

Find hourly flight availability from O'Hare Intl 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 June 26, 2026.

It’s optimal to fly from Chicago O'Hare Intl Airport to Key Largo in the evening. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the afternoon.

Weekly flight availability from Chicago O'Hare Intl Airport to Key Largo

Explore weekly flight availability from O'Hare Intl 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 June 26, 2026.

The most flights from ORD to KE9 are scheduled on a Friday (51 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (34 on average).

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to Key Largo?

What is the cheapest day to fly from Chicago O'Hare Intl Airport to Key Largo?

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Key Largo. Price data was last updated on June 20, 2026.

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Key Largo flight should consider departing on Sunday at noon when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 June 26, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from Chicago O'Hare Intl Airport to Key Largo have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Delta
7.8
Good
8,453 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
United Airlines
7.4
Good
9,893 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
American Airlines
7.1
Good
11,770 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
JetBlue
7.1
Good
3,012 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Frontier
5.6
Fair
2,864 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Overall

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to Key Largo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago O'Hare Intl Airport to Key Largo?

    Departing from Chicago O'Hare Intl Airport to Key Largo will take you 3h 24m. The distance between Chicago O'Hare Intl Airport and Key Largo is about 1198 mi. Most flights are nonstop.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to Key Largo one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $32. JetBlue flights start at $68 while deals on American Airlines start at $78 one-way.

  • What are the most reliable airlines from Chicago O'Hare Intl Airport to Key Largo?

    The top 3 most reliable airlines when flying from Chicago O'Hare Intl Airport to Key Largo are Avianca (89%), Copa Airlines (87%) and United Airlines (87%).

  • What are the cheapest flights from Chicago O'Hare Intl Airport to Key Largo?

    While on average a flight from Chicago O'Hare Intl Airport to Key Largo is generally $966, our data shows the cheapest flight currently is $106. When looking at the most popular route, (Chicago O'Hare Intl - Miami), you can expect to pay $171 for that flight.

  • Can I find deals for flights from O'Hare Intl to Key Largo that include hotel bookings?

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

  • How can I find direct flights from O'Hare Intl to Key Largo?

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

  • Can I find deals for business class flights from O'Hare Intl to Key Largo?

    Yes. Cheapflights offers flight deals from O'Hare Intl 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.

See more FAQs

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Top 6 airlines flying from O'Hare Intl to Key Largo

Discover the top 6 airlines that operate flights from O'Hare Intl 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 June 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$192FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$89Average$258FlexibilityNo cancel feeOn-time62%
DeltaCheapest$108Average$358FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$157Average$367FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$158Average$386FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$176Average$347FlexibilityNo cancel feeOn-time63%

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