HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
George Bush Intcntl

$129+ Cheap flights from Portland, ME (PWM) to George Bush Intcntl (IAH)

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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — IAH
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to George Bush Intcntl 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.

Cheap flight deals from Portland to George Bush Intcntl

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to George Bush Intcntl (IAH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$252
(United Airlines)

One-way from

$129
(United Airlines)

Popular in

May

Cheapest in

July

Average price

$288

Good one-way deal

$324 or less
From Portland to Houston George Bush Intcntl
Search Deals
One-way flight from Portland to Houston George Bush Intcntl
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a one-way flight from Portland to Houston George Bush Intcntl.
Search Deals

Find flight deals from Portland to George Bush Intcntl

Cheapest flights from Portland to George Bush Intcntl
Explore the most affordable flight options available from Portland to George Bush Intcntl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/303:20 pmPWM - IAH
1 stop8h 31mUnited Airlines
Fri 10/316:30 amIAH - PWM
1 stop6h 42mUnited Airlines
Deal found 9/10$252
This Delta deal was found by Cheapflights users on 9/11. 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 11/11:27 pmPWM - IAH
1 stop7h 14mDelta
Mon 11/35:30 amIAH - PWM
1 stop5h 52mDelta
Deal found 9/11$257
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:54 pmPWM - IAH
1 stop7h 03mUnited Airlines
Sun 11/166:30 amIAH - PWM
1 stop6h 42mUnited Airlines
Deal found 9/10$270
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:20 amPWM - IAH
1 stop12h 26mAmerican Airlines
Mon 11/35:01 pmIAH - PWM
1 stop5h 58mAmerican Airlines
Deal found 9/10$282
This Delta deal was found by Cheapflights users on 9/11. 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.
Thu 11/206:00 amPWM - IAH
1 stop7h 31mDelta
Thu 11/275:16 amIAH - PWM
1 stop6h 14mDelta
Deal found 9/11$283
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:00 amPWM - IAH
1 stop6h 17mAmerican Airlines
Thu 10/25:05 pmIAH - PWM
1 stop5h 40mAmerican Airlines
Deal found 9/10$296
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Wed 11/125:21 pmPWM - IAH
1 stop6h 34mAmerican Airlines
Mon 11/175:01 pmIAH - PWM
1 stop5h 58mAmerican Airlines
Deal found 9/11$309
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:25 pmPWM - IAH
1 stop6h 07mUnited Airlines
Sun 10/265:00 amIAH - PWM
1 stop8h 12mUnited Airlines
Deal found 9/10$316
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:00 amPWM - IAH
2 stops8h 33mAmerican Airlines
Fri 10/315:00 amIAH - PWM
2 stops8h 38mAmerican Airlines
Deal found 9/10$319

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to George Bush Intcntl 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 September 11, 2025.
Use the filters below to find and compare flights from Portland to Houston George Bush Intcntl Airport that are best for you.

Fly from

Portland

Fly to

George Bush Intcntl

Route

Depart

Return

Price

PortlandHouston

PWM - IAH

PWMIAH

Portland

Thu 11/13

1:25 pm-9:16 pm

1 stop8h 51m

Houston George Bush Intcntl

Mon 11/17

5:16 am-12:30 pm

1 stop6h 14m

$257

PortlandHouston

PWM - IAH

PWMIAH

Portland

Sat 11/1

1:27 pm-7:41 pm

1 stop7h 14m

Houston George Bush Intcntl

Mon 11/3

5:30 am-12:22 pm

1 stop5h 52m

$257

PortlandHouston

PWM - IAH

PWMIAH

Portland

Fri 11/14

4:54 pm-10:57 pm

1 stop7h 03m

Houston George Bush Intcntl

Sun 11/16

6:30 am-2:12 pm

1 stop6h 42m

$270

PortlandHouston

PWM - IAH

PWMIAH

Portland

Sat 11/1

6:20 am-5:46 pm

1 stop12h 26m

Houston George Bush Intcntl

Mon 11/3

5:01 pm-11:59 pm

1 stop5h 58m

$282

PortlandHouston

PWM - IAH

PWMIAH

Portland

Thu 11/20

4:54 pm-11:59 pm

1 stop8h 05m

Houston George Bush Intcntl

Thu 11/27

7:20 am-2:12 pm

1 stop5h 52m

$283

PortlandHouston

PWM - IAH

PWMIAH

Portland

Thu 11/20

6:00 am-12:31 pm

1 stop7h 31m

Houston George Bush Intcntl

Thu 11/27

5:16 am-12:30 pm

1 stop6h 14m

$283

PortlandHouston

PWM - IAH

PWMIAH

Portland

Tue 9/30

9:18 am-5:01 pm

1 stop8h 43m

Houston George Bush Intcntl

Thu 10/2

5:05 pm-11:45 pm

1 stop5h 40m

$296

PortlandHouston

PWM - IAH

PWMIAH

Portland

Tue 2/24

11:25 am-5:14 pm

1 stop6h 49m

Houston George Bush Intcntl

Fri 2/27

10:00 am-11:00 am

1 stop24h 00m

$302

PortlandHouston

PWM - IAH

PWMIAH

Portland

Wed 11/19

4:53 pm-10:24 pm

1 stop6h 31m

$129

PortlandHouston

PWM - IAH

PWMIAH

Portland

Wed 1/14

9:00 am-5:20 pm

1 stop9h 20m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 16 results
1
2

Best time to book a flight from Portland to George Bush Intcntl

Have a flexible travel schedule? Discover the best time to fly to George Bush Intcntl from Portland 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 Portland to Houston George Bush Intcntl Airport

What is the cheapest month to book a flight from Portland, Maine to Houston George Bush Intcntl Airport?

Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Houston George Bush Intcntl Airport (average of $241). Flying from Portland, Maine to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $339). 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 PWM to IAH?

Find hourly flight availability from Portland to George Bush Intcntl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Portland, Maine to Houston George Bush Intcntl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 8% versus a flight in the morning.

Reviews of airlines servicing George Bush Intcntl

Get insights into the airlines that provide service to George Bush Intcntl. 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 George Bush Intcntl. Reviews last updated September 11, 2025.
Read through reviews of airlines operating flights from Portland to Houston George Bush Intcntl Airport, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.8
Fair
3,177 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Portland to George Bush Intcntl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Houston George Bush Intcntl?

    For a flight from Portland to Houston George Bush Intcntl, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city. Portland is the only Portland airport and it handles 0 outbound flights to Houston George Bush Intcntl per day. 4 airlines have flights to Houston George Bush Intcntl from Portland on a regular basis.

  • How long is the flight from Portland, Maine to Houston George Bush Intcntl Airport?

    There are many flights that can get you from Portland, Maine to Houston George Bush Intcntl Airport in 7h 03m. Fly via Delta, United Airlines, or American Airlines to get the fastest option. The distance between Portland, Maine and Houston George Bush Intcntl Airport is about 1664 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Portland, Maine to Houston George Bush Intcntl Airport round-trip?

    Frontier, at $208, was found to be the cheapest airline from Portland, Maine to Houston George Bush Intcntl Airport.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Users have found that Frontier is 44% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Portland, Maine to Houston George Bush Intcntl Airport one-way?

    The cheapest airlines for a one-way flight from Portland, Maine to Houston George Bush Intcntl Airport are Delta ($129), United Airlines ($129), and American Airlines ($155).

  • What are the cheapest flights from Portland, Maine to Houston George Bush Intcntl Airport?

    On average you can expect to pay $324 for a flight from Portland, Maine to Houston George Bush Intcntl Airport. The cheapest flight overall is $279 while the most popular route, (Portland - Houston George Bush Intcntl) is currently priced at $252.

  • Can I find deals for flights from Portland to George Bush Intcntl that include hotel bookings?

    Yes. In addition to deals on Portland to George Bush Intcntl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to George Bush Intcntl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to George Bush Intcntl.

  • Can I find deals for business class flights from Portland to George Bush Intcntl?

    Yes. Cheapflights offers flight deals from Portland to George Bush Intcntl 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 Portland, Maine to Houston George Bush Intcntl Airport?

    Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Houston George Bush Intcntl Airport (average of $241). Flying from Portland, Maine to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $339). 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

Traveling to a place near Houston George Bush Intcntl Airport?

Book flights to Houston George Bush Intcntl Airport if you plan to visit one of these locations
Montgomery
Spring
Jersey Village
Humble
The Woodlands
Conroe
Tomball
Katy
Cypress

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 Portland to George Bush Intcntl

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Hobby flights
Boston to George Bush Intcntl flights
Portland to Hobby flights
Bangor to Hobby flights
Bangor to George Bush Intcntl flights
Presque Isle to George Bush Intcntl flights

Top 4 airlines flying from Portland to George Bush Intcntl

Discover the top 4 airlines that operate flights from Portland to George Bush Intcntl. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$208Average$218FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$236Average$426FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$247Average$433FlexibilityNo cancel feeOn-time69%
DeltaCheapest$256Average$341FlexibilityNo cancel feeOn-timeN/A

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.