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Key Largo

$39+ Cheap flights from Houston 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 3/21. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — MIA
Feb 21 — Feb 281
Sat 2/21
Sat 2/28
1 adult, Economy
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Cheapflights Tip: The best prices from Houston to Key Largo are usually found in October or September, booked 18 days in advance, depart on a Sunday or Monday and return on a Wednesday

Cheap flight deals from Houston to Key Largo

Cheapest flights from Houston to Key Largo
Explore the most affordable flight options available from Houston to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 22, 2026.

This Trip.com deal was found by Cheapflights users on 1/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/18:47 pm
IAH
-
MIA
Nonstop2h 27m
Multiple Airlines
Sun 2/88:51 pm
MIA
-
IAH
Nonstop3h 05m
Multiple Airlines
Deal found 1/22$77
This Kiwi.com deal was found by Cheapflights users on 1/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:24 pm
IAH
-
MIA
Nonstop2h 27m
Multiple Airlines
Sat 2/143:09 pm
MIA
-
IAH
Nonstop3h 21m
Multiple Airlines
Deal found 1/22$78
This CheapOair deal was found by Cheapflights users on 1/20. 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 2/286:25 pm
IAH
-
MIA
Nonstop2h 34m
Frontier
Sun 3/16:30 am
MIA
-
IAH
Nonstop3h 10m
Frontier
Deal found 1/20$79
This Kiwi.com deal was found by Cheapflights users on 1/21. 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.
Thu 1/292:32 pm
IAH
-
MIA
Nonstop2h 29m
Multiple Airlines
Tue 2/31:01 pm
MIA
-
IAH
Nonstop3h 07m
Multiple Airlines
Deal found 1/21$80
This Cheapflightsfares deal was found by Cheapflights users on 1/20. 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 2/285:24 pm
IAH
-
MIA
Nonstop2h 27m
Spirit Airlines
Sat 3/72:41 pm
MIA
-
IAH
Nonstop3h 04m
Spirit Airlines
Deal found 1/20$81
This CheapOair deal was found by Cheapflights users on 1/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/48:30 am
IAH
-
MIA
Nonstop2h 26m
Spirit Airlines
Sat 2/78:51 pm
MIA
-
IAH
Nonstop3h 05m
Spirit Airlines
Deal found 1/22$82
This CheapOair deal was found by Cheapflights users on 1/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/145:24 pm
IAH
-
MIA
Nonstop2h 20m
Spirit Airlines
Tue 3/179:45 pm
MIA
-
IAH
Nonstop3h 04m
Spirit Airlines
Deal found 1/21$83
This Mytrip deal was found by Cheapflights users on 1/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/254:20 pm
IAH
-
MIA
Nonstop2h 26m
Multiple Airlines
Sat 1/318:43 pm
MIA
-
IAH
Nonstop3h 33m
Multiple Airlines
Deal found 1/21$84
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 2/216:25 pm
IAH
-
MIA
Nonstop2h 34m
Multiple Airlines
Thu 3/199:45 pm
MIA
-
IAH
Nonstop3h 04m
Multiple Airlines
Deal found 1/20$86
This Priceline deal was found by Cheapflights users on 1/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/74:06 pm
IAH
-
MIA
Nonstop2h 27m
Multiple Airlines
Wed 2/116:45 am
MIA
-
IAH
1 stop9h 34m
Multiple Airlines
Deal found 1/22$87
This CheapOair deal was found by Cheapflights users on 1/19. 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.
Thu 1/294:20 pm
IAH
-
MIA
Nonstop2h 26m
Spirit Airlines
Sat 1/318:51 pm
MIA
-
IAH
Nonstop3h 05m
Spirit Airlines
Deal found 1/19$88
This Southwest deal was found by Cheapflights users on 1/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/92:45 pm
HOU
-
MIA
Nonstop2h 15m
Southwest
Wed 3/115:30 am
MIA
-
HOU
Nonstop2h 55m
Southwest
Deal found 1/21$177

Find flight deals from Houston to Key Largo

Keep the following information in mind while searching for Houston to Key Largo flight deals. Data was last updated January 22, 2026.

Round-trip from

$77
(Trip.com)

One-way from

$39
(Mytrip)

Popular in

April

Cheapest in

October

Average price

$182
From Houston to Key Largo
Search Deals
One-way flight from Houston to Key Largo
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Houston 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 January 22, 2026.
Use the filters below to find and compare flights from Houston to Key Largo that are best for you.

Fly from

Houston

Fly to

Key Largo

Route

Depart

Return

Price

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Sun 2/15

9:35 am-1:03 pm

Nonstop2h 28m

Miami

Sat 2/21

5:05 am-4:52 pm

1 stop12h 47m

$93

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Thu 2/12

5:24 pm-8:51 pm

Nonstop2h 27m

Miami

Mon 2/16

9:53 pm-11:59 pm

Nonstop3h 06m

$139

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Wed 3/18

7:30 am-3:24 pm

1 stop6h 54m

Miami

Wed 3/18

9:45 pm-11:49 pm

Nonstop3h 04m

$144

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Sat 2/28

10:10 am-1:48 pm

Nonstop2h 38m

Miami

Sat 3/7

9:00 am-11:07 am

Nonstop3h 07m

$157

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Tue 2/10

12:16 pm-1:14 am

2 stops11h 58m

Miami

Thu 2/12

7:05 am-5:12 pm

1 stop11h 07m

$160

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Sun 3/15

5:24 pm-8:44 pm

Nonstop2h 20m

Miami

Mon 3/23

3:12 pm-10:24 am

1 stop20h 12m

$170

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Mon 3/9

2:55 pm-6:31 pm

Nonstop2h 36m

Miami

Wed 3/11

10:22 am-12:34 pm

Nonstop3h 12m

$177

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Wed 3/25

5:49 pm-12:47 am

1 stop5h 58m

Miami

Sun 3/29

5:05 am-4:22 pm

1 stop12h 17m

$184

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Wed 2/25

7:59 pm-10:28 am

2 stops13h 29m

Miami

Sun 3/1

7:05 am-10:51 pm

1 stop16h 46m

$194

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Fri 2/27

8:18 pm-12:16 pm

2 stops14h 58m

Miami

Mon 3/2

10:05 am-9:13 pm

1 stop12h 08m

$203

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 43 results
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Best time to book a flight from Houston to Key Largo

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

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

Use this chart to determine the optimal time to book a round-trip flight from Houston to Key Largo. Price data was last updated on January 16, 2026.

Booking 18 days in advance of your planned departure date is, on average, the best time to get cheap flights from Houston to Key Largo. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, February is the cheapest month in which you can book a flight from Houston to Key Largo (average of $50). Flying from Houston to Key Largo in July is currently the most expensive (average of $98). 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 HOU to KE9?

Find hourly flight availability from Houston 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 January 22, 2026.

It’s optimal to fly from Houston to Key Largo in the evening. By choosing this option you can save up to 36% on the cost of your flight, compared to a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Houston to Key Largo. Price data was last updated on January 17, 2026.

Travelers seeking maximum savings on their Houston to Key Largo flight should consider departing on Monday evenings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Houston 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 January 22, 2026.
See what other customers who have flown with Southwest, United Airlines, and American Airlines from Houston 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
4,267 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,267 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
9,192 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
11,176 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Spirit Airlines
6.3
Okay
8,365 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Frontier
5.7
Fair
3,056 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

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

    For as low as $139, Frontier can have you in Key Largo from Houston in 2h 27m. The distance between Houston and Key Largo is about 962 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines to fly from Houston to Key Largo one-way?

    The cheapest airlines for a one-way flight from Houston to Key Largo are Frontier ($36), Spirit Airlines ($37), and American Airlines ($58).

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

    Looking for the cheapest flight from Houston to Key Largo? While on average our users pay $388, our data indicates the cheapest price to be $263. The most popular route (Houston Hobby - Miami), is priced around $61.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Houston to Key Largo (average of $50). Flying from Houston to Key Largo in July is currently the most expensive (average of $98). 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 Houston to Key Largo

Discover the top 6 airlines that operate flights from Houston 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 January 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$45Average$155FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$60Average$156FlexibilityNo cancel feeOn-time65%
DeltaCheapest$98Average$331FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$117Average$333FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$125Average$333FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$157Average$309FlexibilityNo cancel feeOn-time63%

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