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Cheap flights from Portsmouth to Houston from £680

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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — HOU
10 Jun — 17 Jun1
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 May 2026.

Fri 21/809:20
SOU
-
IAH
2 stops37h 44m
Multiple Airlines
Fri 11/917:15
IAH
-
SOU
2 stops17h 35m
Multiple Airlines
Deal found 10/5£974
Fri 21/809:15
SOU
-
IAH
1 stop34h 05m
KLM
Fri 11/915:20
IAH
-
SOU
1 stop11h 25m
KLM
Deal found 10/5£1,065
Wed 30/906:50
SOU
-
IAH
2 stops18h 25m
British Airways
Sun 4/1021:10
IAH
-
SOU
2 stops30h 35m
British Airways
Deal found 7/5£1,130
Wed 18/1118:20
SOU
-
IAH
2 stops25h 45m
British Airways
Wed 2/1215:50
IAH
-
SOU
2 stops21h 35m
British Airways
Deal found 6/5£1,148
Wed 4/1112:35
SOU
-
IAH
2 stops31h 30m
British Airways
Sun 8/1115:50
IAH
-
SOU
2 stops35h 55m
British Airways
Deal found 10/5£1,176
Fri 21/820:00
SOU
-
IAH
2 stops29h 15m
Aer Lingus
Fri 11/911:13
IAH
-
SOU
2 stops15h 27m
Aer Lingus
Deal found 10/5£1,189
Sun 7/609:15
SOU
-
HOU
2 stops18h 28m
Delta
Sat 13/617:12
HOU
-
SOU
2 stops17h 38m
Delta
Deal found 10/5£1,283
Fri 21/818:05
SOU
-
HOU
2 stops28h 20m
Virgin Atlantic
Fri 11/913:00
HOU
-
SOU
2 stops13h 45m
Virgin Atlantic
Deal found 10/5£1,535

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 May 2026.

Round-trip from

£974

One-way from

£680

Popular in

July

Cheapest in

September

Average price

£778
21/8-11/9
  • 21/8-11/9
  • 4 total stops
  • 55h 19m total
  • Portsmouth to Houston
Search Deals
12/7
  • 12/7
  • 2 total stops
  • 29h 25m total
  • Portsmouth to Houston
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£63 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 May 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 21/8

09:20-17:04

2 stops37h 44m

Houston George Bush Intcntl

Fri 11/9

17:15-16:50

2 stops17h 35m

£974

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Fri 21/8

09:15-13:20

1 stop34h 05m

Houston George Bush Intcntl

Fri 11/9

15:20-08:45

1 stop11h 25m

£1,065

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 30/9

06:50-19:15

2 stops18h 25m

Houston George Bush Intcntl

Sun 4/10

21:10-20:55

2 stops17h 45m

£1,130

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 4/11

12:35-14:05

2 stops31h 30m

Houston George Bush Intcntl

Sun 8/11

15:50-09:45

2 stops35h 55m

£1,176

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Fri 21/8

20:00-19:15

2 stops29h 15m

Houston George Bush Intcntl

Fri 11/9

11:13-08:40

2 stops15h 27m

£1,189
Fastest return journey

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Sun 7/6

09:15-21:43

2 stops18h 28m

Houston Hobby

Sat 13/6

17:12-16:50

2 stops17h 38m

£1,283

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Fri 21/8

18:05-16:25

2 stops28h 20m

Houston Hobby

Fri 11/9

13:00-08:45

2 stops13h 45m

£1,535

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 27/5

06:45-19:15

2 stops18h 30m

Houston George Bush Intcntl

Sat 30/5

15:25-20:15

2 stops22h 50m

£2,119
Cheapest one-way

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sun 12/7

20:00-22:39

3 stops56h 39m

£689

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 13/7

19:55-13:25

2 stops23h 30m

£762

Flights are sorted by cheapest return flights first.

Deals found on 10/5

Showing 1-10 of 13 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 May 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. KLM provides one of the quickest options available for as low as £1,130. 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

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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
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Heathrow to George Bush Intcntl flights
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Edinburgh to George Bush Intcntl flights
Gatwick to San Antonio flights
Edinburgh to Love Field flights
Newcastle upon Tyne to Hobby flights
Birmingham to Dallas/Fort Worth flights
Newcastle upon Tyne to George Bush Intcntl flights
Birmingham to Hobby flights
London City to San Antonio flights
Southend to Dallas/Fort Worth flights
Birmingham to Love Field flights
Bristol to Dallas/Fort Worth flights
Southampton to Austin flights
Heathrow to Brownsville flights
Manchester to San Antonio flights
Birmingham to George Bush Intcntl flights
Birmingham to Austin flights
Liverpool to Dallas/Fort Worth flights
Gatwick to Love Field flights
Edinburgh to Austin flights
Leeds to Dallas/Fort Worth flights
Newcastle upon Tyne to Dallas/Fort Worth flights
Manchester to Harlingen flights
Newcastle upon Tyne to Austin flights
London City to Love Field 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 May 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest£39Average£80FlexibilityNo cancel feeOn-time62%
Search Frontier flights
WestJetCheapest£168Average£794FlexibilityNo cancel feeOn-time60%
Search WestJet flights
IberiaCheapest£340Average£956FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Virgin AtlanticCheapest£381Average£736FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£432Average£782FlexibilityNo cancel feeOn-time75%
Search KLM flights
IcelandairCheapest£480Average£787FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Austrian AirlinesCheapest£503Average£784FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
JetBlueCheapest£504Average£664FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
LufthansaCheapest£508Average£801FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£510Average£796FlexibilityNo cancel feeOn-time76%
Search Finnair 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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