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Key Largo

$55+ 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MIA
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
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 August, booked 23 days in advance, depart on a Monday or Friday and return on a Friday

Find 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 October 28, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 10/26. 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 12/67:41 pmORD - MIA
Nonstop3h 16mSpirit Airlines
Thu 12/114:08 pmMIA - ORD
Nonstop3h 28mSpirit Airlines
Deal found 10/26$105
This Priceline deal was found by Cheapflights users on 10/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:41 pmORD - MIA
Nonstop3h 16mSpirit Airlines
Sat 12/134:08 pmMIA - ORD
Nonstop3h 28mSpirit Airlines
Deal found 10/27$106
This Cheapflightsfares deal was found by Cheapflights users on 10/26. 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.
Thu 12/117:41 pmORD - MIA
Nonstop3h 16mSpirit Airlines
Sun 12/144:08 pmMIA - ORD
Nonstop3h 28mSpirit Airlines
Deal found 10/26$107
This Priceline deal was found by Cheapflights users on 10/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:41 pmORD - MIA
Nonstop3h 16mSpirit Airlines
Wed 12/242:35 pmMIA - ORD
Nonstop3h 25mSpirit Airlines
Deal found 10/27$108
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/2011:40 amORD - MIA
Nonstop3h 07mSpirit Airlines
Mon 11/248:10 amMIA - ORD
Nonstop3h 25mSpirit Airlines
Deal found 10/28$112
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/2511:40 amORD - MIA
Nonstop3h 07mSpirit Airlines
Thu 12/44:08 pmMIA - ORD
Nonstop3h 28mSpirit Airlines
Deal found 10/28$113
This Expedia deal was found by Cheapflights users on 10/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1012:17 pmORD - MIA
Nonstop3h 05mSpirit Airlines
Thu 11/137:20 amMIA - ORD
Nonstop3h 27mSpirit Airlines
Deal found 10/27$114
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 12/167:41 pmORD - MIA
Nonstop3h 16mMultiple Airlines
Wed 1/77:09 pmMIA - ORD
1 stop5h 52mMultiple Airlines
Deal found 10/26$115
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:15 amORD - MIA
1 stop11h 40mMultiple Airlines
Mon 12/154:08 pmMIA - ORD
Nonstop3h 28mMultiple Airlines
Deal found 10/27$116
This Cheapflightsfares deal was found by Cheapflights users on 10/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:41 pmORD - MIA
Nonstop3h 16mSpirit Airlines
Mon 12/154:08 pmMIA - ORD
Nonstop3h 28mSpirit Airlines
Deal found 10/27$117

Cheap 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 October 28, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$105
(Cheapflightsfares)

One-way from

$55
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$267
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. 11% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 28, 2025.
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

O'Hare Intl

Fly to

Key Largo

Route

Depart

Return

Price

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Tue 1/27

5:33 am-12:14 pm

1 stop5h 41m

Miami

Sat 2/7

6:00 am-10:15 am

1 stop5h 15m

$217

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 1/31

5:59 pm-12:51 am

1 stop5h 52m

Miami

Tue 2/10

6:00 am-10:08 am

1 stop5h 08m

$217

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Tue 2/3

10:35 am-5:48 pm

1 stop6h 13m

Miami

Wed 2/4

6:00 am-10:08 am

1 stop5h 08m

$217

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Mon 11/17

9:51 am-5:18 pm

1 stop6h 27m

Miami

Wed 11/19

8:05 am-12:19 pm

1 stop5h 14m

$252

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Wed 11/19

6:45 am-1:02 pm

1 stop5h 17m

Miami

Thu 11/20

7:00 am-12:04 pm

1 stop6h 04m

$330

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Tue 12/16

10:55 am-3:10 pm

Nonstop3h 15m

Miami

Sat 12/20

2:10 pm-4:44 pm

Nonstop3h 34m

$335

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 12/6

7:35 am-11:49 am

Nonstop3h 14m

Miami

Thu 12/11

12:23 pm-2:52 pm

Nonstop3h 29m

$347

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sun 4/5

7:10 am-2:39 pm

1 stop6h 29m

Miami

Fri 4/10

7:00 am-1:23 pm

1 stop7h 23m

$373

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sun 4/19

10:45 am-2:55 pm

Nonstop3h 10m

Miami

Sun 4/26

7:25 am-9:45 am

Nonstop3h 20m

$400

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Fri 4/17

6:10 pm-10:16 pm

Nonstop3h 06m

Miami

Sun 4/26

7:25 am-9:45 am

Nonstop3h 20m

$400

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 23 results
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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

How far ahead should I book a flight from Chicago O'Hare Intl Airport to Key Largo?

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Key Largo. Price data was last updated on October 24, 2025.

To ensure you get the cheapest price possible for a flight from Chicago O'Hare Intl Airport to Key Largo, you should look to book at least 23 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Key Largo?

Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Key Largo (average of $80). Flying from Chicago O'Hare Intl Airport to Key Largo in June is currently the most expensive (average of $117). 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 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 October 28, 2025.

It’s optimal to fly from Chicago O'Hare Intl Airport to Key Largo in the morning. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the evening.

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 December 16, 2024.

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Key Largo flight should consider departing on Wednesday mornings 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.

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 October 28, 2025.
See what other customers who have flown with Southwest, United Airlines, and American 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.
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Sarah,Aug 2024

MDW - AUS

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.
Southwest
8.0
Very good
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Sarah,Aug 2024

MDW - AUS

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.
United Airlines
7.4
Good
9,001 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Sarah,Aug 2024

MDW - AUS

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.
American Airlines
7.2
Good
11,032 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Sarah,Aug 2024

MDW - AUS

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.
Spirit Airlines
6.3
Okay
8,116 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Sarah,Aug 2024

MDW - AUS

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.
Frontier
5.8
Fair
3,124 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Sarah,Aug 2024

MDW - AUS

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

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 5h 41m. The distance between Chicago O'Hare Intl Airport and Key Largo is about 1198 mi.

  • 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 Spirit Airlines (88%), United Airlines (86%) and Alaska Airlines (82%).

  • 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 $655, our data shows the cheapest flight currently is $59. When looking at the most popular route, (Chicago O'Hare Intl - Miami), you can expect to pay $84 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.

  • What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Key Largo?

    Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Key Largo (average of $80). Flying from Chicago O'Hare Intl Airport to Key Largo in June is currently the most expensive (average of $117). 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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Alternative routes for O'Hare Intl to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from O'Hare Intl to Key Largo

Discover the top 7 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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$198FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$86Average$196FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$156Average$441FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$169Average$369FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$174Average$411FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$176Average$215FlexibilityNo cancel feeOn-time75%
DeltaCheapest$176Average$365FlexibilityNo cancel feeOn-timeN/A

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