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Key Largo

$52+ 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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MIA
May 28 — Jun 41
Thu 5/28
Thu 6/4
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 Sunday 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 April 28, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:52 pm
ORD
-
MIA
Nonstop3h 19m
Multiple Airlines
Fri 5/89:30 pm
MIA
-
ORD
Nonstop3h 26m
Multiple Airlines
Deal found 4/24$120
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:52 pm
ORD
-
MIA
Nonstop3h 19m
Frontier
Tue 5/1211:23 am
MIA
-
ORD
1 stop9h 28m
Frontier
Deal found 4/24$127
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:52 pm
ORD
-
MIA
Nonstop3h 19m
Frontier
Mon 5/115:22 pm
MIA
-
ORD
1 stop15h 33m
Frontier
Deal found 4/24$129
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:52 pm
ORD
-
MIA
1 stop17h 52m
Multiple Airlines
Thu 5/142:17 pm
MIA
-
ORD
Nonstop3h 37m
Multiple Airlines
Deal found 4/24$133
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/271:50 pm
ORD
-
MIA
1 stop7h 57m
Frontier
Wed 6/311:23 am
MIA
-
ORD
1 stop9h 28m
Frontier
Deal found 4/27$136
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/145:49 pm
ORD
-
MIA
Nonstop3h 18m
Multiple Airlines
Thu 5/219:30 pm
MIA
-
ORD
Nonstop3h 26m
Multiple Airlines
Deal found 4/25$138
This Cheapflightsfares deal was found by Cheapflights users on 4/25. 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.
Mon 5/119:20 am
ORD
-
MIA
Nonstop3h 08m
Spirit Airlines
Fri 5/159:30 pm
MIA
-
ORD
Nonstop3h 26m
Spirit Airlines
Deal found 4/25$139
This CheapOair deal was found by Cheapflights users on 4/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/119:20 am
ORD
-
MIA
Nonstop3h 08m
Spirit Airlines
Thu 5/149:30 pm
MIA
-
ORD
Nonstop3h 26m
Spirit Airlines
Deal found 4/25$140
This Cheapflightsfares deal was found by Cheapflights users on 4/25. 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.
Sat 5/23:52 pm
ORD
-
MIA
Nonstop3h 19m
Frontier
Thu 5/72:13 pm
MIA
-
ORD
Nonstop3h 37m
Frontier
Deal found 4/25$141
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:52 pm
ORD
-
MIA
Nonstop3h 19m
Multiple Airlines
Thu 5/79:30 pm
MIA
-
ORD
Nonstop3h 26m
Multiple Airlines
Deal found 4/24$142

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 April 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$120
(Kiwi.com)

One-way from

$52
(Super.com)

Popular in

December

Cheapest in

September

Average price

$265
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.
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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. 3% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 28, 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

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Tue 9/1

5:30 am-12:57 pm

1 stop6h 27m

Miami

Tue 9/8

2:03 pm-6:39 pm

1 stop5h 36m

$221

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 5/16

10:35 am-2:57 pm

Nonstop3h 22m

Miami

Mon 5/18

7:40 pm-10:20 pm

Nonstop3h 40m

$221

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Tue 9/15

9:30 am-3:44 pm

1 stop5h 14m

Miami

Thu 9/24

7:30 pm-11:57 pm

1 stop5h 27m

$312
Quickest round-trip

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 9/26

7:15 am-11:23 am

Nonstop3h 08m

Miami

Wed 9/30

12:15 pm-2:39 pm

Nonstop3h 24m

$348

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 6/13

6:05 pm-10:27 pm

Nonstop3h 22m

Miami

Mon 6/15

12:30 pm-3:13 pm

Nonstop3h 43m

$350

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Wed 7/29

10:40 am-3:04 pm

Nonstop3h 24m

Miami

Mon 8/3

4:06 pm-6:49 pm

Nonstop3h 43m

$350

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sun 5/10

6:13 pm-10:33 pm

Nonstop3h 20m

Miami

Wed 5/13

12:10 pm-2:50 pm

Nonstop3h 40m

$357

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Thu 10/8

6:08 pm-10:17 pm

Nonstop3h 09m

Miami

Sat 10/17

7:00 am-1:13 pm

1 stop7h 13m

$360

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Tue 6/16

10:40 am-3:04 pm

Nonstop3h 24m

Miami

Fri 6/19

5:24 pm-8:08 pm

Nonstop3h 44m

$391

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Mon 9/28

8:15 am-2:33 pm

1 stop5h 18m

Miami

Fri 10/2

6:00 am-10:04 am

1 stop5h 04m

$413

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 23 resultsSorted by cheapest first
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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 April 28, 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 32% on the cost of your flight, compared to a flight in the morning.

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 April 25, 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. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 April 28, 2026.

The most flights from ORD to KE9 are scheduled on a Tuesday (49 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

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

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 April 28, 2026.
See what other customers who have flown with United Airlines,JetBlue, 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.
United Airlines
7.4
Good
9,675 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,675 reviews
United Airlines
7.4
Good
9,675 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
JetBlue
7.2
Good
2,967 reviews
United Airlines
7.4
Good
9,675 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
American Airlines
7.1
Good
11,676 reviews
United Airlines
7.4
Good
9,675 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Spirit Airlines
6.3
Okay
8,632 reviews
United Airlines
7.4
Good
9,675 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Frontier
5.7
Fair
2,970 reviews
United Airlines
7.4
Good
9,675 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 22m. The distance between Chicago O'Hare Intl Airport and Key Largo is about 1198 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $36. Spirit Airlines flights start at $37 while deals on JetBlue start at $68 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 Qatar Airways (73%), GOL (71%) and American Airlines (70%).

  • 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 $699, our data shows the cheapest flight currently is $44. When looking at the most popular route, (Chicago O'Hare Intl - Miami), you can expect to pay $139 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 8 airlines flying from O'Hare Intl to Key Largo

Discover the top 8 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 April 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$188FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$68Average$243FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$89Average$260FlexibilityNo cancel feeOn-time62%
DeltaCheapest$108Average$336FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$156Average$367FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$158Average$373FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$176Average$249FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$176Average$373FlexibilityNo cancel feeOn-time63%

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