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Key Largo

$56+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MIA
Dec 10 — Dec 171
Wed 12/10
Wed 12/17
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 November 10, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 11/9. 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 12/99:14 pmORD - MIA
1 stop10h 09mSpirit Airlines
Tue 12/1612:00 pmMIA - ORD
1 stop9h 09mSpirit Airlines
Deal found 11/9$113
This eDestinos deal was found by Cheapflights users on 11/7. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1712:17 pmORD - MIA
Nonstop3h 05mSpirit Airlines
Mon 11/248:10 amMIA - ORD
Nonstop3h 25mSpirit Airlines
Deal found 11/7$114
This Kiwi.com deal was found by Cheapflights users on 11/8. 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
Sun 12/215:30 amMIA - ORD
1 stop14h 03mMultiple Airlines
Deal found 11/8$115
This Cheapflightsfares deal was found by Cheapflights users on 11/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:14 pmORD - MIA
1 stop10h 09mSpirit Airlines
Thu 12/182:35 pmMIA - ORD
Nonstop3h 25mSpirit Airlines
Deal found 11/10$116
This Cheapflightsfares deal was found by Cheapflights users on 11/9. 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 12/246:05 pmORD - MIA
Nonstop3h 16mSpirit Airlines
Sun 1/185:30 amMIA - ORD
Nonstop3h 24mSpirit Airlines
Deal found 11/9$117
This CheapOair deal was found by Cheapflights users on 11/9. 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.
Sat 12/67:41 pmORD - MIA
Nonstop3h 16mSpirit Airlines
Sat 12/134:08 pmMIA - ORD
Nonstop3h 28mSpirit Airlines
Deal found 11/9$118
This Mytrip deal was found by Cheapflights users on 11/9. 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.
Wed 12/246:05 pmORD - MIA
Nonstop3h 16mSpirit Airlines
Wed 12/312:35 pmMIA - ORD
Nonstop3h 25mSpirit Airlines
Deal found 11/9$119
This Super.com deal was found by Cheapflights users on 11/9. 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 Super.com 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 12/84:08 pmMIA - ORD
Nonstop3h 28mSpirit Airlines
Deal found 11/9$120
This Cheapflightsfares deal was found by Cheapflights users on 11/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:41 pmORD - MIA
Nonstop3h 16mSpirit Airlines
Mon 12/152:19 pmMIA - ORD
1 stop8h 52mSpirit Airlines
Deal found 11/10$122
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 11/2411:40 amORD - MIA
Nonstop3h 07mMultiple Airlines
Wed 11/267:00 amMIA - ORD
1 stop11h 39mMultiple Airlines
Deal found 11/9$123
This CheapOair deal was found by Cheapflights users on 11/9. 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.
Sun 12/76:00 amORD - MIA
1 stop10h 14mFrontier
Sat 12/132:13 pmMIA - ORD
1 stop21h 18mFrontier
Deal found 11/9$124

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 November 10, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$113
(Super.com)

One-way from

$56
(eDestinos)

Popular in

March

Cheapest in

September

Average price

$271
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
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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 ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 10, 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

Sun 1/11

5:33 am-12:14 pm

1 stop5h 41m

Miami

Wed 2/11

6:00 am-10:08 am

1 stop5h 08m

$217

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Fri 1/9

5:55 pm-12:51 am

1 stop5h 56m

Miami

Sat 2/7

8:15 am-1:49 pm

1 stop6h 34m

$217

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 12/6

6:10 pm-12:46 am

1 stop5h 36m

Miami

Tue 12/9

8:05 am-12:10 pm

1 stop5h 05m

$217

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Mon 2/2

10:35 am-5:48 pm

1 stop6h 13m

Miami

Fri 2/6

6:00 am-10:08 am

1 stop5h 08m

$217

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Wed 1/28

2:49 pm-9:41 pm

1 stop5h 52m

Miami

Thu 2/5

12:00 pm-6:49 pm

1 stop7h 49m

$217

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Fri 1/9

5:55 pm-12:51 am

1 stop5h 56m

Miami

Sat 1/17

7:15 am-1:40 pm

1 stop7h 25m

$217

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Fri 2/6

3:45 pm-9:10 am

2 stops16h 25m

Miami

Sat 2/14

6:35 am-11:10 am

1 stop5h 35m

$259

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Fri 1/30

1:58 pm-9:37 pm

1 stop6h 39m

Miami

Sat 1/31

6:00 am-10:15 am

1 stop5h 15m

$303

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Mon 1/12

3:55 pm-8:20 pm

Nonstop3h 25m

Miami

Mon 1/19

7:05 am-12:25 pm

1 stop6h 20m

$308

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sun 12/7

7:35 am-11:49 am

Nonstop3h 14m

Miami

Sun 12/7

5:56 pm-8:25 pm

Nonstop3h 29m

$317

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 23 results
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

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 November 7, 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, February 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 November 10, 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.

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 November 10, 2025.

The most flights from ORD to KE9 are scheduled on a Sunday (40 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (27 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 November 10, 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
4,236 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

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
4,236 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

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
9,012 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

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
11,045 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

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
8,135 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

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
3,113 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

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 ANA (100%), Spirit Airlines (91%) and Emirates (89%).

  • 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 $660, our data shows the cheapest flight currently is $57. When looking at the most popular route, (Chicago O'Hare Intl - Miami), you can expect to pay $68 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, February 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.

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Alternative routes for O'Hare Intl to Key Largo

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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 November 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$192FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$86Average$195FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$156Average$442FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$169Average$369FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$170Average$409FlexibilityNo cancel feeOn-time69%
DeltaCheapest$176Average$361FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$176Average$215FlexibilityNo cancel feeOn-time75%

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