Houston

$35+ Cheap flights from Key Largo, FL to Houston

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — HOU
Mar 9 — Mar 161
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Key Largo to Houston 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 Key Largo to Houston are usually found in October or September, booked 82 days in advance, depart on a Wednesday or Thursday and return on a Sunday

Cheap flight deals from Key Largo to Houston

Cheapest flights from Key Largo to Houston
Explore the most affordable flight options available from Key Largo to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 7, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 2/5. 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 3/49:53 pm
MIA
-
IAH
Nonstop3h 06m
Spirit Airlines
Wed 3/118:00 am
IAH
-
MIA
1 stop8h 27m
Spirit Airlines
Deal found 2/5$74
This CheapOair deal was found by Cheapflights users on 2/4. 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.
Fri 2/209:53 pm
MIA
-
IAH
Nonstop3h 06m
Spirit Airlines
Tue 2/245:24 pm
IAH
-
MIA
Nonstop2h 27m
Spirit Airlines
Deal found 2/4$75
This Priceline deal was found by Cheapflights users on 2/4. 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 4/1611:34 am
MIA
-
IAH
Nonstop3h 05m
Multiple Airlines
Mon 4/205:23 pm
IAH
-
MIA
Nonstop2h 27m
Multiple Airlines
Deal found 2/4$76
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 4/89:45 pm
MIA
-
IAH
Nonstop3h 04m
Spirit Airlines
Sun 4/2611:37 am
IAH
-
MIA
Nonstop2h 27m
Spirit Airlines
Deal found 2/3$77
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 4/149:45 pm
MIA
-
IAH
Nonstop3h 04m
Spirit Airlines
Sat 4/2511:37 am
IAH
-
MIA
Nonstop2h 27m
Spirit Airlines
Deal found 2/3$79
This CheapOair deal was found by Cheapflights users on 2/5. 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 3/189:45 pm
MIA
-
IAH
Nonstop3h 04m
Spirit Airlines
Tue 3/315:24 pm
IAH
-
MIA
Nonstop2h 20m
Spirit Airlines
Deal found 2/5$80
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/127:00 am
MIA
-
IAH
Nonstop3h 13m
Multiple Airlines
Tue 2/175:24 pm
IAH
-
MIA
Nonstop2h 27m
Multiple Airlines
Deal found 2/2$81
This Cheapflightsfares deal was found by Cheapflights users on 2/4. 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 2/289:53 pm
MIA
-
IAH
Nonstop3h 06m
Spirit Airlines
Sat 3/76:50 pm
IAH
-
MIA
Nonstop2h 27m
Spirit Airlines
Deal found 2/4$82
This CheapOair deal was found by Cheapflights users on 2/3. 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 2/189:53 pm
MIA
-
IAH
Nonstop3h 06m
Spirit Airlines
Sat 2/285:24 pm
IAH
-
MIA
Nonstop2h 27m
Spirit Airlines
Deal found 2/3$84
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 4/911:30 am
MIA
-
IAH
Nonstop3h 20m
Multiple Airlines
Fri 4/245:23 pm
IAH
-
MIA
Nonstop2h 27m
Multiple Airlines
Deal found 2/3$85
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 4/109:45 pm
MIA
-
IAH
Nonstop3h 04m
Spirit Airlines
Sun 4/2611:37 am
IAH
-
MIA
Nonstop2h 27m
Spirit Airlines
Deal found 2/3$86
This Southwest deal was found by Cheapflights users on 2/4. 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.
Tue 3/105:30 am
MIA
-
HOU
Nonstop2h 55m
Southwest
Wed 3/112:45 pm
HOU
-
MIA
Nonstop2h 15m
Southwest
Deal found 2/4$157

Find flight deals from Key Largo to Houston

Keep the following information in mind while searching for Key Largo to Houston flight deals. Data was last updated February 7, 2026.

Round-trip from

$74
(Cheapflightsfares)

One-way from

$35
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$168
From Key Largo to Houston
One-way flight from Key Largo to Houston
Highest demand for flights based on searches. 3% potential increase in price ($6 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Average for round-trip flights in February 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Houston 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 February 7, 2026.
Use the filters below to find and compare flights from Key Largo to Houston that are best for you.

Fly from

Key Largo

Fly to

Houston

Route

Depart

Return

Price

MiamiHouston

MIA - IAH

MIAIAH

Miami

Fri 5/1

11:34 am-1:39 pm

Nonstop3h 05m

Houston George Bush Intcntl

Thu 5/7

2:39 pm-6:08 pm

Nonstop2h 29m

$85

MiamiHouston

MIA - IAH

MIAIAH

Miami

Thu 3/5

7:00 am-9:13 am

Nonstop3h 13m

Houston George Bush Intcntl

Thu 3/12

2:39 pm-6:08 pm

Nonstop2h 29m

$85

MiamiHouston

MIA - IAH

MIAIAH

Miami

Sat 2/14

3:09 pm-5:30 pm

Nonstop3h 21m

Houston George Bush Intcntl

Thu 2/19

10:08 am-1:40 pm

Nonstop2h 32m

$88

MiamiHouston

MIA - IAH

MIAIAH

Miami

Thu 2/26

9:53 pm-11:59 pm

Nonstop3h 06m

Houston George Bush Intcntl

Tue 3/24

7:05 am-7:16 pm

1 stop11h 11m

$89

MiamiHouston

MIA - IAH

MIAIAH

Miami

Thu 2/26

7:00 am-9:13 am

Nonstop3h 13m

Houston George Bush Intcntl

Tue 3/24

7:05 am-7:16 pm

1 stop11h 11m

$90

MiamiHouston

MIA - IAH

MIAIAH

Miami

Thu 3/19

9:45 pm-11:49 pm

Nonstop3h 04m

Houston George Bush Intcntl

Sun 3/22

5:24 pm-8:44 pm

Nonstop2h 20m

$90

MiamiHouston

MIA - IAH

MIAIAH

Miami

Thu 2/26

9:53 pm-11:59 pm

Nonstop3h 06m

Houston George Bush Intcntl

Sun 3/1

5:24 pm-8:51 pm

Nonstop2h 27m

$90

MiamiHouston

MIA - IAH

MIAIAH

Miami

Tue 2/24

9:53 pm-11:59 pm

Nonstop3h 06m

Houston George Bush Intcntl

Thu 2/26

5:24 pm-8:51 pm

Nonstop2h 27m

$90

MiamiHouston

MIA - IAH

MIAIAH

Miami

Wed 4/8

9:45 pm-11:49 pm

Nonstop3h 04m

Houston George Bush Intcntl

Sun 4/19

5:23 pm-8:50 pm

Nonstop2h 27m

$91

MiamiHouston

MIA - IAH

MIAIAH

Miami

Sat 4/11

9:45 pm-11:49 pm

Nonstop3h 04m

Houston George Bush Intcntl

Sat 4/25

5:05 am-12:38 pm

1 stop6h 33m

$92

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/5

Showing 1-10 of 44 results
1
2
3
...
5

Best time to book a flight from Key Largo to Houston

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

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Houston. Price data was last updated on January 30, 2026.

Booking 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from Key Largo to Houston. 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 Key Largo to Houston?

Currently, March is the cheapest month in which you can book a flight from Key Largo to Houston (average of $39). Flying from Key Largo to Houston in July is currently the most expensive (average of $92). 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 KE9 to HOU?

Find hourly flight availability from Key Largo to Houston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 7, 2026.

One of the essential ways to save on airfare from Key Largo to Houston is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 46% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Houston. Price data was last updated on February 23, 2025.

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

Reviews of airlines servicing Houston

Get insights into the airlines that provide service to Houston. 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 Houston. Reviews last updated February 7, 2026.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American Airlines from Key Largo to Houston to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

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

    Frontier, Spirit Airlines, and Southwest can get you from Key Largo to Houston in just under 3h. Your travel time will be generally consistent. There are 953 mi between Key Largo and Houston. Generally, flights for this route are nonstop.

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

    One-way options have recently been found by users for as low as $34 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $39 and American Airlines from $58 one-way.

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

    While on average a flight from Key Largo to Houston is generally $306, our data shows the cheapest flight currently is $109. When looking at the most popular route, (Miami - Houston Hobby), you can expect to pay $57 for that flight.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Key Largo to Houston (average of $39). Flying from Key Largo to Houston in July is currently the most expensive (average of $92). 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 Key Largo to Houston

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Key Largo to Houston

Discover the top 5 airlines that operate flights from Key Largo to Houston. 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 February 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$26Average$135FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$58Average$147FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$107Average$244FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$107Average$267FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$107Average$273FlexibilityNo cancel feeOn-time69%

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.