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Cheap flights from Portsmouth to Houston George Bush Intcntl Airport from £342

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 31/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAH
18 May — 25 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to George Bush Intcntl

Enter your travel dates to find the best prices.

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 18 April 2026.

Thu 4/606:50
SOU
-
IAH
2 stops36h 30m
British Airways
Sun 7/615:25
IAH
-
SOU
2 stops22h 00m
British Airways
Deal found 17/4£1,256
Sun 19/709:15
SOU
-
IAH
1 stop34h 05m
Delta
Wed 5/815:25
IAH
-
SOU
1 stop11h 20m
Delta
Deal found 16/4£1,316
Sun 19/711:15
SOU
-
IAH
2 stops32h 10m
British Airways
Wed 5/821:05
IAH
-
SOU
2 stops30h 40m
British Airways
Deal found 16/4£1,330
Sun 19/711:15
SOU
-
IAH
2 stops32h 10m
British Airways
Thu 6/821:05
IAH
-
SOU
2 stops35h 25m
British Airways
Deal found 16/4£1,338
Wed 22/708:55
SOU
-
IAH
2 stops16h 25m
British Airways
Wed 5/821:05
IAH
-
SOU
2 stops30h 40m
British Airways
Deal found 16/4£1,341
Sun 19/717:30
SOU
-
IAH
1 stop25h 50m
Delta
Sat 1/815:25
IAH
-
SOU
1 stop11h 20m
Delta
Deal found 16/4£1,346
Wed 22/708:55
SOU
-
IAH
2 stops16h 25m
British Airways
Thu 6/821:05
IAH
-
SOU
2 stops35h 25m
British Airways
Deal found 16/4£1,349
Sat 18/709:15
SOU
-
IAH
1 stop34h 05m
Delta
Thu 6/815:25
IAH
-
SOU
1 stop20h 10m
Delta
Deal found 16/4£1,386
Sat 18/709:15
SOU
-
IAH
1 stop34h 05m
Delta
Sun 2/815:25
IAH
-
SOU
1 stop11h 20m
Delta
Deal found 16/4£1,417

Find 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 18 April 2026.

Round-trip from

£1,256

One-way from

£342

Popular in

July

Cheapest in

February

Average price

£745
British Airways
  • British Airways
  • 4/6-7/6
  • 4 total stops
  • 58h 30m total
  • Portsmouth to Houston
Search Deals
31/5
  • 31/5
  • 3 total stops
  • 53h 55m total
  • Portsmouth to Houston
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£67 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth 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 858,174 searches. Data last updated 18 April 2026.
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

Cheapest return flight

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 4/6

06:50-13:20

2 stops36h 30m

Houston George Bush Intcntl

Sun 7/6

15:25-19:25

2 stops22h 00m

£1,256
Fastest return journey

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Tue 21/7

18:05-13:20

1 stop25h 15m

Houston George Bush Intcntl

Tue 4/8

15:25-08:45

1 stop11h 20m

£1,316

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 20/7

14:25-13:25

2 stops29h 00m

Houston George Bush Intcntl

Mon 3/8

21:05-20:55

2 stops17h 50m

£1,330

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sun 19/7

14:45-13:25

2 stops28h 40m

Houston George Bush Intcntl

Tue 4/8

21:05-21:05

2 stops18h 00m

£1,330

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sat 18/7

09:15-13:20

1 stop34h 05m

Houston George Bush Intcntl

Sun 2/8

15:25-08:45

1 stop11h 20m

£1,417

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sat 18/7

09:15-13:20

1 stop34h 05m

Houston George Bush Intcntl

Fri 31/7

15:25-08:45

1 stop11h 20m

£1,458
Cheapest one-way

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sun 31/5

08:55-08:50

3 stops53h 55m

£342

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sat 30/5

20:05-15:12

2 stops49h 07m

£578

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sun 26/7

21:25-19:20

2 stops51h 55m

£946

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Tue 28/7

19:55-19:20

2 stops29h 25m

£946

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

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 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 18 April 2026.

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

Explore weekly flight availability from Portsmouth to George Bush Intcntl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 18 April 2026.

The most flights from P0R to IAH are scheduled on a Monday (22 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (17 on average).

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?

    A quick flight from Portsmouth to Houston George Bush Intcntl Airport can take about 25h 15m. British Airways provides one of the quickest options available for as low as £1,316. 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 (85%), Austrian Airlines (84%) or Brussels Airlines (84%) 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 £507. While the most popular route (Southampton Eastleigh - Houston George Bush Intcntl) can be booked for £1,256 on average, our data indicates £1,232 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Portsmouth to George Bush Intcntl

Discover the top 10 airlines that operate flights from Portsmouth 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 858,174 searches. Data last updated 18 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£384Average£727FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£436Average£788FlexibilityNo cancel feeOn-time75%
Search KLM flights
IcelandairCheapest£484Average£725FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
JetBlueCheapest£506Average£665FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
LufthansaCheapest£515Average£760FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£548Average£586FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£550Average£809FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£562Average£722FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Brussels AirlinesCheapest£566Average£773FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Austrian AirlinesCheapest£573Average£798FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portsmouth to George Bush Intcntl?

Cheapflights makes it easy to find Portsmouth to George Bush Intcntl flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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.

Can Cheapflights find flights from Portsmouth to George Bush Intcntl with no change fees?

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.

Can Cheapflights notify me if prices for flights from Portsmouth to George Bush Intcntl become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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