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Cheap flights from Portsmouth to Houston 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 — HOU
17 May — 24 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Houston

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Houston
Explore the most affordable flight options available from Portsmouth to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2026.

Thu 4/614:25
SOU
-
IAH
2 stops34h 45m
British Airways
Sun 7/615:25
IAH
-
SOU
2 stops22h 00m
British Airways
Deal found 16/4£1,255
Sun 19/709:15
SOU
-
IAH
1 stop34h 05m
Delta
Wed 5/815:25
IAH
-
SOU
1 stop11h 20m
Delta
Deal found 16/4£1,314
Sun 19/714:45
SOU
-
IAH
2 stops28h 40m
British Airways
Mon 3/821:05
IAH
-
SOU
2 stops17h 50m
British Airways
Deal found 16/4£1,329
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£1,337
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£1,340
Sun 19/717:30
SOU
-
IAH
1 stop25h 50m
Delta
Sat 1/815:25
IAH
-
SOU
1 stop11h 20m
Delta
Deal found 16/4£1,345
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£1,348
Sat 18/709:15
SOU
-
IAH
1 stop34h 05m
Delta
Thu 6/815:25
IAH
-
SOU
1 stop20h 10m
Delta
Deal found 16/4£1,385
Sat 18/709:15
SOU
-
IAH
1 stop34h 05m
Delta
Sun 2/815:25
IAH
-
SOU
1 stop11h 20m
Delta
Deal found 16/4£1,416
Thu 23/414:25
SOU
-
IAH
2 stops34h 45m
British Airways
Mon 27/421:00
IAH
-
SOU
2 stops17h 55m
British Airways
Deal found 13/4£1,435
Sat 30/509:15
SOU
-
HOU
2 stops19h 11m
KLM
Sat 6/610:27
HOU
-
SOU
2 stops16h 18m
KLM
Deal found 15/4£2,047

Find flight deals from Portsmouth to Houston

Keep the following information in mind while searching for Portsmouth to Houston flight deals. Data was last updated 17 April 2026.

Round-trip from

£1,255

One-way from

£342

Popular in

July

Cheapest in

February

Average price

£744
British Airways
  • British Airways
  • 4/6-7/6
  • 4 total stops
  • 56h 45m 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 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 858,174 searches. Data last updated 17 April 2026.
Use the filters below to find and compare flights from Portsmouth to Houston 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

14:25-19:10

2 stops34h 45m

Houston George Bush Intcntl

Sun 7/6

15:25-19:25

2 stops22h 00m

£1,255

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 20/7

14:25-13:25

2 stops29h 00m

Houston George Bush Intcntl

Tue 4/8

21:05-21:05

2 stops18h 00m

£1,329

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

£1,329

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

£1,329

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

£1,416

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

£1,457
Fastest return journey

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Sat 30/5

09:15-22:26

2 stops19h 11m

Houston Hobby

Sat 6/6

10:27-08:45

2 stops16h 18m

£2,047
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
Fastest single journey

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 29/7

06:50-19:20

2 stops18h 30m

£944

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Showing 1-10 of 25 resultsSorted by cheapest first
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2
3

Best time to book a flight from Portsmouth to Houston

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

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

Find hourly flight availability from Portsmouth 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 17 April 2026.

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

Related info for your journey

Find useful and relevant information for your journey from Portsmouth 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 Portsmouth to Houston?

    A quick flight from Portsmouth to Houston can take about 19h 11m. British Airways provides one of the quickest options available for as low as £2,047. Airlines will cover a distance of 4813 mi. This flight may include one or multiple stops.

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

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

  • How can I find direct flights from Portsmouth to Houston?

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

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

    Yes. Cheapflights offers flight deals from Portsmouth 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portsmouth to Houston

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dallas/Fort Worth flights
Heathrow to Hobby flights
Heathrow to George Bush Intcntl flights
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Heathrow to Love Field flights
Heathrow to Austin flights
London City to Hobby flights
Gatwick to George Bush Intcntl flights
Stansted to Hobby flights
London City to George Bush Intcntl flights
Gatwick to Austin flights
Stansted to Austin flights
London City to Austin flights
Luton to Dallas/Fort Worth flights
Manchester to Dallas/Fort Worth flights
Manchester to Hobby flights
Manchester to George Bush Intcntl flights
Manchester to Love Field flights
Heathrow to San Antonio flights
Manchester to Austin flights
Edinburgh to Dallas/Fort Worth flights
Edinburgh to Hobby flights
Edinburgh to George Bush Intcntl flights
Birmingham to Dallas/Fort Worth flights
Southend to Dallas/Fort Worth flights
Edinburgh to Love Field flights
Newcastle upon Tyne to Hobby flights
Gatwick to San Antonio flights
Liverpool to Dallas/Fort Worth flights
Birmingham to George Bush Intcntl flights
Birmingham to Hobby flights
Leeds to Dallas/Fort Worth flights
Newcastle upon Tyne to Dallas/Fort Worth flights
Heathrow to El Paso flights
Gatwick to Love Field flights
Manchester to San Antonio flights
Newcastle upon Tyne to George Bush Intcntl flights
Birmingham to Love Field flights
Southampton to Hobby flights
Southampton to George Bush Intcntl flights
Leeds to Austin flights
Edinburgh to Austin flights
London City to Love Field flights
Bristol to Dallas/Fort Worth flights
Birmingham to Austin flights
Leeds to George Bush Intcntl flights
Heathrow to Harlingen flights

Top 10 airlines flying from Portsmouth to Houston

Discover the top 10 airlines that operate flights from Portsmouth 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 858,174 searches. Data last updated 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest£169Average£800FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Virgin AtlanticCheapest£384Average£732FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£436Average£787FlexibilityNo cancel feeOn-time75%
Search KLM flights
IcelandairCheapest£470Average£750FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
JetBlueCheapest£506Average£653FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Austrian AirlinesCheapest£507Average£786FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
FinnairCheapest£513Average£801FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£515Average£747FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IberiaCheapest£535Average£770FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air CanadaCheapest£548Average£585FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 Houston?

Deals for Portsmouth to Houston flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Houston?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portsmouth to Houston.

Can Cheapflights find flights from Portsmouth to Houston with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portsmouth to Houston flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Portsmouth to Houston 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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