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Cheap flights from Portsmouth to Houston from £696

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 16/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — HOU
26 Aug — 2 Sep1
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 27 July 2026.

Fri 20/1120:00
SOU
-
IAH
2 stops31h 25m
Aer Lingus
Mon 30/1109:09
IAH
-
SOU
2 stops17h 31m
Aer Lingus
Deal found 22/7£923
Fri 20/1120:30
SOU
-
IAH
2 stops28h 35m
Multiple Airlines
Mon 30/1115:05
IAH
-
SOU
1 stop19h 55m
Multiple Airlines
Deal found 22/7£965
Fri 20/1117:30
SOU
-
IAH
1 stop25h 35m
KLM
Mon 30/1115:05
IAH
-
SOU
1 stop19h 55m
KLM
Deal found 22/7£1,013
Thu 20/818:05
SOU
-
IAH
1 stop25h 15m
Delta
Wed 30/915:25
IAH
-
SOU
1 stop19h 25m
Delta
Deal found 25/7£1,130
Sat 7/1107:50
SOU
-
IAH
2 stops18h 05m
British Airways
Wed 11/1115:50
IAH
-
SOU
2 stops16h 55m
British Airways
Deal found 25/7£1,157
Thu 20/818:05
SOU
-
IAH
1 stop25h 15m
Delta
Sun 27/915:25
IAH
-
SOU
1 stop19h 25m
Delta
Deal found 25/7£1,160
Thu 20/818:05
SOU
-
IAH
1 stop25h 15m
Delta
Thu 1/1015:25
IAH
-
SOU
1 stop19h 25m
Delta
Deal found 25/7£1,198
Tue 18/809:15
SOU
-
IAH
1 stop34h 05m
Delta
Mon 28/915:25
IAH
-
SOU
1 stop19h 25m
Delta
Deal found 25/7£1,241
Mon 17/809:15
SOU
-
IAH
1 stop34h 05m
Delta
Thu 24/915:25
IAH
-
SOU
1 stop19h 25m
Delta
Deal found 25/7£1,262
Wed 19/809:15
SOU
-
IAH
1 stop34h 05m
Delta
Tue 29/915:25
IAH
-
SOU
1 stop11h 20m
Delta
Deal found 25/7£1,271

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 27 July 2026.

Round-trip from

£923

One-way from

£696

Popular in

June

Cheapest in

February

Average price

£869
Aer Lingus
  • Aer Lingus
  • 20/11-30/11
  • 4 total stops
  • 48h 56m total
  • Portsmouth to Houston
Search Deals
British Airways
  • British Airways
  • 16/11
  • 2 total stops
  • 30h 00m total
  • Portsmouth to Houston
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£71 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£12 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 27 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 20/11

17:30-13:05

1 stop25h 35m

Houston George Bush Intcntl

Mon 30/11

15:05-17:00

1 stop19h 55m

£1,013
Fastest return journey

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sat 7/11

07:50-19:55

2 stops18h 05m

Houston George Bush Intcntl

Wed 11/11

15:50-14:45

2 stops16h 55m

£1,157

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Tue 18/8

18:05-13:20

1 stop25h 15m

Houston George Bush Intcntl

Thu 24/9

15:25-16:50

1 stop19h 25m

£1,262

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 17/8

18:05-13:20

1 stop25h 15m

Houston George Bush Intcntl

Sat 26/9

15:25-08:45

1 stop11h 20m

£1,271

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Tue 18/8

09:15-13:20

1 stop34h 05m

Houston George Bush Intcntl

Sat 26/9

15:25-16:50

1 stop19h 25m

£1,271

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 17/8

09:15-13:20

1 stop34h 05m

Houston George Bush Intcntl

Sun 27/9

15:25-16:50

1 stop19h 25m

£1,271

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 20/8

19:55-19:15

2 stops29h 20m

Houston George Bush Intcntl

Thu 24/9

15:40-17:45

2 stops20h 05m

£1,316
Cheapest one-way

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 16/11

19:55-19:55

2 stops30h 00m

£696

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sun 23/8

11:05-19:15

2 stops38h 10m

£960

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 20/8

14:25-19:15

2 stops34h 50m

£1,161

Flights are sorted by cheapest return flights first.

Deals found on 21/7

Showing 1-10 of 23 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 27 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 05m. KLM provides one of the quickest options available for as low as £1,157. 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

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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.
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Heathrow to Brownsville flights
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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 27 July 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest£40Average£107FlexibilityNo cancel feeOn-time62%
Search Frontier flights
WestJetCheapest£171Average£790FlexibilityNo cancel feeOn-time60%
Search WestJet flights
IberiaCheapest£351Average£1,226FlexibilityNo cancel feeOn-time77%
Search Iberia flights
KLMCheapest£367Average£484FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£390Average£726FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£521Average£841FlexibilityNo cancel feeOn-time76%
Search Finnair flights
JetBlueCheapest£533Average£720FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£562Average£604FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Brussels AirlinesCheapest£574Average£831FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£575Average£783FlexibilityNo 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!

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