Find flights
When to book
FAQs

Cheap flights from Portsmouth to Houston from £688

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — HOU
10 Aug — 17 Aug1
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 11 July 2026.

Thu 24/906:50
SOU
-
IAH
2 stops18h 30m
British Airways
Mon 28/921:05
IAH
-
SOU
2 stops17h 50m
British Airways
Deal found 8/7£1,149
Sat 11/717:30
SOU
-
IAH
1 stop25h 50m
KLM
Sun 19/715:25
IAH
-
SOU
1 stop20h 10m
KLM
Deal found 6/7£1,367
Sat 11/717:30
SOU
-
IAH
3 stops31h 45m
Multiple Airlines
Sun 19/715:25
IAH
-
SOU
1 stop11h 20m
Multiple Airlines
Deal found 6/7£1,373
Fri 7/809:15
SOU
-
HOU
2 stops18h 50m
KLM
Thu 13/810:50
HOU
-
SOU
2 stops15h 55m
KLM
Deal found 10/7£1,527
Tue 28/718:00
SOU
-
IAH
2 stops25h 25m
British Airways
Thu 3/1221:50
IAH
-
SOU
2 stops17h 05m
British Airways
Deal found 9/7£1,748
Sun 26/711:05
SOU
-
IAH
2 stops32h 20m
British Airways
Sat 28/1121:50
IAH
-
SOU
2 stops28h 35m
British Airways
Deal found 9/7£1,780
Wed 29/715:00
SOU
-
IAH
2 stops28h 25m
British Airways
Sat 28/1115:50
IAH
-
SOU
2 stops16h 40m
British Airways
Deal found 9/7£1,811
Fri 31/706:45
SOU
-
IAH
2 stops18h 35m
British Airways
Sat 28/1121:50
IAH
-
SOU
2 stops16h 30m
British Airways
Deal found 9/7£1,824
Sat 11/709:15
SOU
-
HOU
2 stops18h 36m
Delta
Sun 19/706:00
HOU
-
SOU
2 stops20h 45m
Delta
Deal found 6/7£2,902

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 11 July 2026.

Round-trip from

£1,149

One-way from

£688

Popular in

June

Cheapest in

September

Average price

£905
British Airways
  • British Airways
  • 25/9-29/9
  • 4 total stops
  • 49h 05m total
  • Portsmouth to Houston
Search Deals
British Airways
  • British Airways
  • 1/9
  • 2 total stops
  • 28h 25m total
  • Portsmouth to Houston
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£78 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 11 July 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

Fri 25/9

06:50-19:15

2 stops18h 25m

Houston George Bush Intcntl

Tue 29/9

21:05-09:45

2 stops30h 40m

£1,149

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 24/9

06:50-19:20

2 stops18h 30m

Houston George Bush Intcntl

Mon 28/9

21:05-20:55

2 stops17h 50m

£1,149
Fastest return journey

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Fri 7/8

09:15-22:05

2 stops18h 50m

Houston Hobby

Thu 13/8

10:50-08:45

2 stops15h 55m

£1,527

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Tue 28/7

06:50-13:25

2 stops36h 35m

Houston George Bush Intcntl

Sat 28/11

21:50-20:20

2 stops16h 30m

£1,780

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Fri 31/7

06:45-19:20

2 stops18h 35m

Houston George Bush Intcntl

Sat 28/11

21:50-20:20

2 stops16h 30m

£1,824
Cheapest one-way

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sun 30/8

20:50-19:15

2 stops52h 25m

£718

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 3/9

06:50-13:25

2 stops36h 35m

£758

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sun 18/10

20:50-13:25

2 stops22h 35m

£772

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sat 29/8

14:55-13:25

2 stops52h 30m

£801

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 22/7

16:00-13:25

2 stops27h 25m

£1,411

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

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 11 July 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 18h 25m. British Airways provides one of the quickest options available for as low as £1,149. Airlines will cover a distance of 4799 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Gatwick to Dallas/Fort Worth flights
Heathrow to Austin flights
Heathrow to Love Field flights
Stansted to Dallas/Fort Worth flights
Gatwick to Hobby flights
London City to Hobby flights
London City to Dallas/Fort Worth flights
Gatwick to George Bush Intcntl flights
Stansted to George Bush Intcntl flights
London City to George Bush Intcntl flights
Luton to Dallas/Fort Worth flights
Gatwick to Austin flights
Stansted to Austin flights
London City to Austin flights
Gatwick to Love Field flights
Manchester to Dallas/Fort Worth flights
Heathrow to San Antonio flights
Birmingham to Dallas/Fort Worth flights
Manchester to Love Field flights
Manchester to Hobby flights
Manchester to Austin flights
Manchester to George Bush Intcntl flights
Birmingham to Love Field flights
Gatwick to San Antonio flights
Newcastle upon Tyne to Dallas/Fort Worth flights
Edinburgh to Dallas/Fort Worth flights
Edinburgh to Hobby flights
Newcastle upon Tyne to Hobby flights
Southend to Dallas/Fort Worth flights
Edinburgh to George Bush Intcntl flights
Heathrow to El Paso flights
Birmingham to Hobby flights
Leeds to Dallas/Fort Worth flights
London City to San Antonio flights
Edinburgh to Austin flights
Birmingham to George Bush Intcntl flights
Southend to George Bush Intcntl flights
Birmingham to San Antonio flights
Bristol to Dallas/Fort Worth flights
Birmingham to Austin flights
Heathrow to McAllen flights
Newcastle upon Tyne to George Bush Intcntl flights
London City to Love Field flights
Manchester to San Antonio flights
London City to El Paso flights
Liverpool to Dallas/Fort Worth flights
Newcastle upon Tyne to Austin 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 11 July 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest£40Average£106FlexibilityNo cancel feeOn-time62%
Search Frontier flights
WestJetCheapest£170Average£785FlexibilityNo cancel feeOn-time60%
Search WestJet flights
IberiaCheapest£349Average£1,161FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Virgin AtlanticCheapest£387Average£726FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£484Average£784FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
FinnairCheapest£518Average£835FlexibilityNo cancel feeOn-time76%
Search Finnair flights
JetBlueCheapest£520Average£710FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£553Average£589FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Brussels AirlinesCheapest£570Average£817FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£571Average£769FlexibilityNo cancel feeOn-time70%
Search British Airways 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!

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.