HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Key Largo

$53+ 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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — MIA
Jul 30 — Aug 61
Wed 7/30
Wed 8/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Houston to Key Largo with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Houston to Key Largo are usually found in August or September, booked 44 days in advance, depart on a Sunday or Monday and return on a Tuesday

Cheap 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 July 25, 2025.

Round-trip from

$96
(FlightHub)

One-way from

$53
(Cheapflightsfares)

Popular in

December

Cheapest in

August

Average price

$205
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 ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find 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 July 25, 2025.

This FlightHub deal was found by Cheapflights users on 7/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/193:40 pmIAH - MIA
Nonstop2h 41mSpirit Airlines
Thu 8/286:32 pmMIA - IAH
Nonstop2h 46mSpirit Airlines
Deal found 7/23$96
This American Airlines deal was found by Cheapflights users on 7/24. 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 10/116:17 pmIAH - MIA
Nonstop2h 32mAmerican Airlines
Sat 10/188:26 amMIA - IAH
Nonstop2h 49mAmerican Airlines
Deal found 7/24$107
This Southwest deal was found by Cheapflights users on 7/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/251:05 pmHOU - MIA
Nonstop2h 20mSouthwest
Mon 10/277:30 pmMIA - HOU
Nonstop2h 50mSouthwest
Deal found 7/24$107
This Frontier deal was found by Cheapflights users on 7/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/107:54 pmIAH - MIA
Nonstop2h 42mFrontier
Sun 8/174:57 pmMIA - IAH
Nonstop2h 52mFrontier
Deal found 7/23$119
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Wed 8/133:40 pmIAH - MIA
Nonstop2h 41mMultiple Airlines
Sun 8/174:57 pmMIA - IAH
Nonstop2h 52mMultiple Airlines
Deal found 7/23$127
This Delta deal was found by Cheapflights users on 7/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/61:05 pmHOU - MIA
1 stop7h 23mDelta
Sat 9/136:00 amMIA - HOU
1 stop7h 18mDelta
Deal found 7/22$197
This American Airlines deal was found by Cheapflights users on 7/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:30 pmHOU - MIA
1 stop5h 29mAmerican Airlines
Sat 8/305:20 amMIA - HOU
1 stop5h 24mAmerican Airlines
Deal found 7/23$251

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 July 25, 2025.
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

Tue 8/19

3:40 pm-7:21 pm

Nonstop2h 41m

Miami

Thu 8/28

6:32 pm-8:18 pm

Nonstop2h 46m

$96

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Sat 10/11

6:17 pm-9:49 pm

Nonstop2h 32m

Miami

Sat 10/18

8:26 am-10:15 am

Nonstop2h 49m

$107

HoustonMiami

HOU - MIA

HOUMIA

Houston Hobby

Sat 10/25

1:05 pm-4:25 pm

Nonstop2h 20m

Miami

Mon 10/27

7:30 pm-9:20 pm

Nonstop2h 50m

$107

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Sun 8/10

7:54 pm-11:36 pm

Nonstop2h 42m

Miami

Sun 8/17

4:57 pm-6:49 pm

Nonstop2h 52m

$119

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Wed 8/13

3:40 pm-7:21 pm

Nonstop2h 41m

Miami

Sun 8/17

4:57 pm-6:49 pm

Nonstop2h 52m

$127

HoustonMiami

HOU - MIA

HOUMIA

Houston Hobby

Sat 9/6

1:05 pm-9:28 pm

1 stop7h 23m

Miami

Sat 9/13

6:00 am-12:18 pm

1 stop7h 18m

$197

HoustonMiami

HOU - MIA

HOUMIA

Houston Hobby

Fri 8/22

6:30 pm-12:59 am

1 stop5h 29m

Miami

Sat 8/30

5:20 am-9:44 am

1 stop5h 24m

$251

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Sat 8/9

4:29 pm-8:04 pm

Nonstop2h 35m

$53

HoustonMiami

IAH - MIA

IAHMIA

Houston George Bush Intcntl

Sat 10/11

6:17 pm-9:49 pm

Nonstop2h 32m

$54

HoustonMiami

HOU - MIA

HOUMIA

Houston Hobby

Sat 9/6

6:00 pm-9:25 pm

Nonstop2h 25m

$54

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/24

Showing 1-10 of 16 results
1
2

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 July 18, 2025.

Booking 44 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, September is the cheapest month in which you can book a flight from Houston to Key Largo (average of $232). Flying from Houston to Key Largo in March is currently the most expensive (average of $289). 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 July 25, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Houston to Key Largo as you normally would.

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 December 16, 2024.

Travelers seeking maximum savings on their Houston to Key Largo flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday 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 July 25, 2025.
See what other customers who have flown with Southwest, Delta, and United 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
4,233 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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
4,233 reviews
Southwest
8.0
Very good
4,233 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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.
Delta
8.0
Very good
7,967 reviews
Southwest
8.0
Very good
4,233 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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
8,880 reviews
Southwest
8.0
Very good
4,233 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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
10,000 reviews
Southwest
8.0
Very good
4,233 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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.
Sun Country Air
6.9
Okay
334 reviews
Southwest
8.0
Very good
4,233 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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.

  • 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 Spirit Airlines ($53), American Airlines ($54), and Southwest ($54).

  • 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 $243, our data indicates the cheapest price to be $53. The most popular route (Houston Hobby - Miami), is priced around $71.

  • 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, September is the cheapest month in which you can book a flight from Houston to Key Largo (average of $232). Flying from Houston to Key Largo in March is currently the most expensive (average of $289). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Houston to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Orlando flights
Dallas/Fort Worth to Miami flights
Dallas/Fort Worth to Fort Lauderdale flights
Hobby to Orlando flights
Hobby to Miami flights
Love Field to Miami flights
Hobby to Fort Lauderdale flights
George Bush Intcntl to Orlando flights
George Bush Intcntl to Miami flights
George Bush Intcntl to Fort Lauderdale flights
Austin to Orlando flights
Dallas/Fort Worth to Tampa flights
Austin to Miami flights
Love Field to Orlando flights
Austin to Tampa flights
Austin to Fort Lauderdale flights
Dallas/Fort Worth to West Palm Beach flights
Love Field to Fort Lauderdale flights
McAllen to Orlando flights
Hobby to Tampa flights
Dallas/Fort Worth to Pensacola flights
Dallas/Fort Worth to Key West flights
San Antonio to Orlando flights
San Antonio to Miami flights
George Bush Intcntl to Tampa flights
San Antonio to Fort Lauderdale flights
Hobby to Pensacola flights
Dallas/Fort Worth to Jacksonville flights
Love Field to Pensacola flights
Dallas/Fort Worth to Fort Myers flights
Love Field to Tampa flights
George Bush Intcntl to Pensacola flights
Hobby to Fort Myers flights
Hobby to West Palm Beach flights
Hobby to Jacksonville flights
Hobby to Panama City flights
Dallas/Fort Worth to Valparaiso flights
George Bush Intcntl to Fort Myers flights
Dallas/Fort Worth to Sarasota flights
George Bush Intcntl to Jacksonville flights
George Bush Intcntl to West Palm Beach flights
McAllen to Tampa flights
Love Field to Key West flights
Love Field to West Palm Beach flights
George Bush Intcntl to Panama City flights
McAllen to Sarasota flights
Love Field to Jacksonville flights
Brownsville to Tampa flights
Hobby to Key West flights
Harlingen to Tampa flights

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 July 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$163FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$75Average$167FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$144Average$399FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$151Average$381FlexibilityNo cancel feeOn-time71%
DeltaCheapest$172Average$415FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$173Average$321FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.