In terms of precipitation, rainfall in Houston George Bush Intcntl Airport ranges from 81.0 - 150.0 inches per month. June is typically the wettest month, when rainfall can reach 150.0 mm. February is typically the driest time to visit Houston George Bush Intcntl Airport when rainfall is around 81.0 mm.

If weather is an important factor for your trip to Houston George Bush Intcntl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 12.0 C).

What are the cheapest flights from Portsmouth to Houston George Bush Intcntl Airport?

Looking at all options, your cheapest flight can be booked for £446. While the most popular route (Southampton Eastleigh - Houston George Bush Intcntl) can be booked for £748 on average, our data indicates £1,053 when flying from Portsmouth to Houston George Bush Intcntl Airport.

What are the most reliable airlines from Portsmouth to Houston George Bush Intcntl Airport?

No one likes to see their flight delayed. When booking a flight from Portsmouth to Houston George Bush Intcntl Airport consider choosing Air Canada (77%), Austrian Airlines (77%) or Brussels Airlines (77%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from Portsmouth to Houston George Bush Intcntl Airport?

Consider American Airlines, Air Canada or Finnair when booking your flight. These represent the most popular airlines when flying from Portsmouth to Houston George Bush Intcntl Airport.

How far in advance should I book a flight from Portsmouth to Houston George Bush Intcntl Airport?

Travelers have found it’s best to book a flight 38 days in advance to save up to 70% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 38 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Portsmouth to Houston George Bush Intcntl Airport 1-2 weeks in advance for as low as £628, or £895 for flights within the next 24 hours.

What is the cheapest month to fly from Portsmouth to Houston George Bush Intcntl Airport?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, March can be a great choice for travel to Houston George Bush Intcntl Airport. Flights to Houston George Bush Intcntl Airport from Portsmouth in March are about £706 on average during March, but can be found for as low as £496.

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

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

How can I find direct flights from Portsmouth 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 Portsmouth to George Bush Intcntl.

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

Yes. Cheapflights offers flight deals from Portsmouth 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.

£341+ Cheap Flights from Portsmouth to Houston George Bush Intcntl Airport

Cheap flight deals from Portsmouth to George Bush Intcntl

Round-trip from	£715
One-way from	£341
Popular in	July
Cheapest in	March
Average price	£639

KLM
1/10-23/10
2 total stops
53h 25m total
Portsmouth to Houston

Search Deals

2/10
2 total stops
32h 43m total
Portsmouth to Houston

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£91 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£15 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Portsmouth to George Bush Intcntl

Cheapest flights from Portsmouth to George Bush Intcntl
Explore the most affordable flight options available from Portsmouth to George Bush Intcntl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Thu 23/1015:30IAH - SOU

1 stop19h 30mKLM

Deal found 14/9£715

Wed 1/1017:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1012:55IAH - SOU

2 stops22h 05mDelta

Deal found 14/9£716

Thu 2/1017:35SOU - IAH

1 stop25h 40mKLM

Thu 23/1009:42IAH - SOU

2 stops17h 03mKLM

Deal found 14/9£718

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Wed 22/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1013:29IAH - SOU

2 stops21h 31mDelta

Deal found 14/9£745

Wed 1/1017:35SOU - IAH

1 stop25h 40mKLM

Sat 25/1015:30IAH - SOU

1 stop12h 20mKLM

Deal found 14/9£748

Thu 2/1017:35SOU - IAH

1 stop25h 40mDelta

Fri 24/1010:50IAH - SOU

2 stops15h 55mDelta

Deal found 14/9£748

Tue 30/909:20SOU - IAH

2 stops16h 46mDelta

Wed 22/1011:49IAH - SOU

2 stops14h 56mDelta

Deal found 14/9£750

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Fri 24/1010:50IAH - SOU

2 stops15h 55mKLM

Deal found 14/9£751

Best flights from Portsmouth to George Bush Intcntl
Discover carefully curated flight deals from Portsmouth to George Bush Intcntl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 September 2025.

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Thu 23/1015:30IAH - SOU

1 stop19h 30mKLM

Deal found 14/9£715

Wed 1/1017:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1012:55IAH - SOU

2 stops22h 05mDelta

Deal found 14/9£716

Thu 2/1017:35SOU - IAH

1 stop25h 40mKLM

Thu 23/1009:42IAH - SOU

2 stops17h 03mKLM

Deal found 14/9£718

Thu 2/1017:35SOU - IAH

1 stop25h 40mDelta

Wed 22/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Wed 22/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Tue 21/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Sun 5/1018:25SOU - IAH

1 stop24h 50mDelta

Wed 22/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Wed 1/1009:20SOU - IAH

1 stop33h 55mDelta

Wed 22/1007:05IAH - SOU

2 stops27h 55mDelta

Deal found 14/9£745

Last-minute flights from Portsmouth to George Bush Intcntl
Discover last-minute flight deals from Portsmouth to George Bush Intcntl. Data last updated 16 September 2025 and is based on user searches.

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Tue 21/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1013:29IAH - SOU

2 stops21h 31mDelta

Deal found 14/9£745

Tue 30/909:20SOU - IAH

2 stops16h 46mDelta

Wed 22/1011:49IAH - SOU

2 stops14h 56mDelta

Deal found 14/9£750

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Thu 23/1015:30IAH - SOU

1 stop19h 30mKLM

Deal found 14/9£715

Wed 1/1017:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1012:55IAH - SOU

2 stops22h 05mDelta

Deal found 14/9£716

Wed 1/1017:35SOU - IAH

1 stop25h 40mKLM

Sat 25/1015:30IAH - SOU

1 stop12h 20mKLM

Deal found 14/9£748

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Fri 24/1010:50IAH - SOU

2 stops15h 55mKLM

Deal found 14/9£751

Thu 2/1017:35SOU - IAH

1 stop25h 40mKLM

Thu 23/1009:42IAH - SOU

2 stops17h 03mKLM

Deal found 14/9£718

Thu 2/1017:35SOU - IAH

1 stop25h 40mDelta

Fri 24/1010:50IAH - SOU

2 stops15h 55mDelta

Deal found 14/9£748

One-way flights from Portsmouth to George Bush Intcntl
Search for one-way flight options from Portsmouth to George Bush Intcntl. Find affordable one-way fares based on user searches. Data last updated 16 September 2025.

Thu 2/1020:00SOU - IAH

2 stops32h 43mMultiple Airlines

Deal found 14/9£341

Sun 5/1013:10SOU - IAH

3 stops51h 37mMultiple Airlines

Deal found 14/9£369

Wed 1/1020:00SOU - IAH

3 stops49h 04mMultiple Airlines

Deal found 14/9£386

Fri 3/1019:25SOU - IAH

3 stops45h 19mMultiple Airlines

Deal found 14/9£395

Tue 30/920:00SOU - IAH

3 stops42h 24mMultiple Airlines

Deal found 14/9£403

Sat 4/1008:25SOU - IAH

3 stops44h 18mMultiple Airlines

Deal found 14/9£416

Mon 29/920:30SOU - IAH

3 stops54h 37mMultiple Airlines

Deal found 14/9£425

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Houston George Bush Intcntl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 1/10

09:20-13:15

1 stop33h 55m

Houston George Bush Intcntl

Thu 23/10

15:30-17:00

1 stop19h 30m

£715

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 1/10

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Thu 23/10

12:55-17:00

2 stops22h 05m

£716

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 2/10

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Thu 23/10

09:42-08:45

2 stops17h 03m

£718

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 2/10

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Wed 22/10

15:30-17:00

1 stop19h 30m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 29/9

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Wed 22/10

15:30-17:00

1 stop19h 30m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 29/9

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Thu 23/10

15:30-17:00

1 stop19h 30m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 29/9

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Tue 21/10

15:30-17:00

1 stop19h 30m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sun 5/10

18:25-13:15

1 stop24h 50m

Houston George Bush Intcntl

Wed 22/10

15:30-17:00

1 stop19h 30m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 1/10

09:20-13:15

1 stop33h 55m

Houston George Bush Intcntl

Wed 22/10

07:05-17:00

2 stops27h 55m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 2/10

20:00-22:43

2 stops32h 43m

£341

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 21 results

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

Have a flexible travel schedule? Discover the best time to fly to George Bush Intcntl from Portsmouth with our price prediction graph.

Estimated return 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 Portsmouth to Houston George Bush Intcntl Airport

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

Currently, February is the cheapest month in which you can book a flight from Portsmouth to Houston George Bush Intcntl Airport (average of £680). Flying from Portsmouth to Houston George Bush Intcntl Airport in July is currently the most expensive (average of £1,096). 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 P0R to IAH?

When flying from Portsmouth to Houston George Bush Intcntl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Portsmouth to Houston George Bush Intcntl Airport

The most flights from P0R to IAH are scheduled on a Monday (22 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (22 on average).

Related info for your journey

How long is the flight from Portsmouth to Houston George Bush Intcntl Airport?
A quick flight from Portsmouth to Houston George Bush Intcntl Airport can take about 25h 40m. KLM provides one of the quickest options available for as low as £716. Airlines will cover a distance of 4799 mi. This flight may include one or multiple stops.
What are the most reliable airlines from Portsmouth to Houston George Bush Intcntl Airport?
No one likes to see their flight delayed. When booking a flight from Portsmouth to Houston George Bush Intcntl Airport consider choosing Air Canada (77%), Austrian Airlines (77%) or Brussels Airlines (77%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Portsmouth to Houston George Bush Intcntl Airport?
Looking at all options, your cheapest flight can be booked for £446. While the most popular route (Southampton Eastleigh - Houston George Bush Intcntl) can be booked for £748 on average, our data indicates £1,053 when flying from Portsmouth to Houston George Bush Intcntl Airport.
Can I find deals for flights from Portsmouth to George Bush Intcntl that include hotel bookings?
Yes. In addition to deals on Portsmouth to George Bush Intcntl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portsmouth 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 Portsmouth to George Bush Intcntl.
Can I find deals for business class flights from Portsmouth to George Bush Intcntl?
Yes. Cheapflights offers flight deals from Portsmouth 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 Portsmouth to Houston George Bush Intcntl Airport?
Currently, February is the cheapest month in which you can book a flight from Portsmouth to Houston George Bush Intcntl Airport (average of £680). Flying from Portsmouth to Houston George Bush Intcntl Airport in July is currently the most expensive (average of £1,096). 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 10 airlines flying from Portsmouth to George Bush Intcntl

Airline	Cheapest	Average	Flexibility	On-time
WestJet	Cheapest£378	Average£581	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
JetBlue	Cheapest£452	Average£598	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Icelandair	Cheapest£466	Average£696	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Lufthansa	Cheapest£496	Average£744	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£501	Average£622	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
British Airways	Cheapest£530	Average£711	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air Canada	Cheapest£546	Average£581	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Virgin Atlantic	Cheapest£557	Average£768	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Austrian Airlines	Cheapest£587	Average£795	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
United Airlines	Cheapest£594	Average£790	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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Why should you use Cheapflights to find cheap flight tickets from Portsmouth to George Bush Intcntl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to George Bush Intcntl from Portsmouth.

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Certainly. Search results for flights to George Bush Intcntl from Portsmouth shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Cheap flights from Portsmouth to Houston George Bush Intcntl Airport from £341

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to George Bush Intcntl

Keep the following information in mind while searching for Portsmouth to George Bush Intcntl flight deals. Data was last updated 16 September 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portsmouth to George Bush Intcntl

Cheapest flights from Portsmouth to George Bush IntcntlExplore the most affordable flight options available from Portsmouth to George Bush Intcntl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Explore the most affordable flight options available from Portsmouth to George Bush Intcntl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Houston George Bush Intcntl Airport that are best for you.

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

Have a flexible travel schedule? Discover the best time to fly to George Bush Intcntl from Portsmouth with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portsmouth to Houston George Bush Intcntl Airport

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

What is the cheapest time of day to fly from P0R to IAH?

Find hourly flight availability from Portsmouth 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 16 September 2025.

Weekly flight availability from Portsmouth to Houston George Bush Intcntl Airport

Related info for your journey

Find useful and relevant information for your journey from Portsmouth 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.

How long is the flight from Portsmouth to Houston George Bush Intcntl Airport?

What are the most reliable airlines from Portsmouth to Houston George Bush Intcntl Airport?

What are the cheapest flights from Portsmouth to Houston George Bush Intcntl Airport?

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

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

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

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

Travelling to a place near Houston George Bush Intcntl Airport?

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Alternative routes for Portsmouth to George Bush Intcntl

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Top 10 airlines flying from Portsmouth to George Bush Intcntl

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Cheapest flights from Portsmouth to George Bush Intcntl
Explore the most affordable flight options available from Portsmouth to George Bush Intcntl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.