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Cheap flights from Portsmouth to Houston from £486

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 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — HOU
12 May — 19 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 12 April 2026.

Thu 1/1020:00
SOU
-
IAH
2 stops33h 17m
Aer Lingus
Mon 1/221:45
IAH
-
SOU
2 stops28h 55m
Aer Lingus
Deal found 8/4£932
Tue 29/909:15
SOU
-
IAH
2 stops18h 37m
Multiple Airlines
Tue 6/1011:26
IAH
-
SOU
2 stops14h 39m
Multiple Airlines
Deal found 11/4£948
Thu 1/1017:20
SOU
-
IAH
1 stop27h 25m
Multiple Airlines
Mon 1/211:55
IAH
-
SOU
2 stops23h 05m
Multiple Airlines
Deal found 8/4£949
Tue 29/909:05
SOU
-
IAH
1 stop34h 10m
KLM
Tue 6/1015:20
IAH
-
SOU
1 stop19h 30m
KLM
Deal found 11/4£970
Tue 29/909:05
SOU
-
HOU
2 stops18h 30m
Virgin Atlantic
Tue 6/1017:35
HOU
-
SOU
2 stops17h 15m
Virgin Atlantic
Deal found 11/4£1,029
Thu 1/1009:05
SOU
-
HOU
2 stops18h 30m
KLM
Mon 1/210:05
HOU
-
SOU
2 stops16h 45m
KLM
Deal found 8/4£1,107
Thu 23/412:35
SOU
-
IAH
2 stops36h 35m
British Airways
Mon 27/421:00
IAH
-
SOU
2 stops29h 25m
British Airways
Deal found 7/4£1,183
Mon 25/509:05
SOU
-
HOU
2 stops19h 21m
Delta
Mon 1/617:02
HOU
-
SOU
2 stops17h 48m
Delta
Deal found 10/4£1,342

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 12 April 2026.

Round-trip from

£932

One-way from

£486

Popular in

July

Cheapest in

February

Average price

£748
Aer Lingus
  • Aer Lingus
  • 1/10-1/2
  • 4 total stops
  • 62h 12m total
  • Portsmouth to Houston
Search Deals
15/5
  • 15/5
  • 3 total stops
  • 43h 32m total
  • Portsmouth to Houston
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£68 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£13 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 12 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 1/10

09:05-14:45

1 stop35h 40m

Houston George Bush Intcntl

Mon 1/2

15:55-17:00

1 stop19h 05m

£963

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Tue 29/9

09:05-13:15

1 stop34h 10m

Houston George Bush Intcntl

Tue 6/10

15:20-16:50

1 stop19h 30m

£970

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Tue 29/9

09:05-21:35

2 stops18h 30m

Houston Hobby

Tue 6/10

17:35-16:50

2 stops17h 15m

£1,029
Fastest return journey

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Thu 1/10

09:05-21:35

2 stops18h 30m

Houston Hobby

Mon 1/2

10:05-08:50

2 stops16h 45m

£1,107

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Tue 29/9

09:15-13:55

2 stops34h 40m

Houston George Bush Intcntl

Tue 6/10

07:20-19:30

3 stops30h 10m

£1,120

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 23/4

12:35-19:10

2 stops36h 35m

Houston George Bush Intcntl

Mon 27/4

21:00-08:25

2 stops29h 25m

£1,183

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Mon 25/5

09:05-22:26

2 stops19h 21m

Houston Hobby

Mon 1/6

17:02-16:50

2 stops17h 48m

£1,342
Cheapest one-way

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sat 9/5

10:15-13:20

2 stops57h 05m

£865

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 3/8

19:55-19:15

2 stops29h 20m

£947

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Tue 5/5

14:25-19:15

2 stops34h 50m

£1,023

Flights are sorted by cheapest return flights first.

Deals found on 9/4

Showing 1-10 of 24 resultsSorted by cheapest first
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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 month to book a flight from Portsmouth to Houston?

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Houston (average of £189). Flying from Portsmouth to Houston in July is currently the most expensive (average of £666). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 12 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 18h 30m. KLM provides one of the quickest options available for as low as £1,029. 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.

  • What is the cheapest month to book a flight from Portsmouth to Houston?

    Currently, January is the cheapest month in which you can book a flight from Portsmouth to Houston (average of £189). Flying from Portsmouth to Houston in July is currently the most expensive (average of £666). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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.
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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 12 April 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest£170Average£804FlexibilityNo cancel feeOn-time60%
Search WestJet flights
IberiaCheapest£348Average£771FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Virgin AtlanticCheapest£386Average£736FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£438Average£791FlexibilityNo cancel feeOn-time75%
Search KLM flights
IcelandairCheapest£473Average£740FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
JetBlueCheapest£509Average£658FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Austrian AirlinesCheapest£509Average£791FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£512Average£748FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£516Average£801FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air CanadaCheapest£551Average£588FlexibilityNo 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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