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Cheap flights from Portsmouth to Houston from £490

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 18/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — HOU
6 Apr — 13 Apr1
1 adult

Cheap flight deals from Portsmouth to Houston

Keep the following information in mind while searching for Portsmouth to Houston flight deals. Data was last updated 1 April 2025.

Round-trip from

£864

One-way from

£490

Popular in

August

Cheapest in

February

Average price

£775
Delta
  • Delta
  • 24/4-28/4
  • 2 total stops
  • 45h 10m total
  • Portsmouth to Houston
18/4
  • 18/4
  • 3 total stops
  • 50h 40m total
  • Portsmouth to Houston
Highest demand for flights based on searches. 12% potential increase in price (£80 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).
Average for round-trip flights in April 2025

Find flight deals from Portsmouth to Houston

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 1 April 2025.

Thu 24/417:35SOU - IAH
1 stop25h 40mDelta
Mon 28/415:30IAH - SOU
1 stop19h 30mDelta
Deal found 31/3£864
Thu 24/409:20SOU - HOU
2 stops19h 48mDelta
Mon 28/406:00HOU - SOU
2 stops20h 50mDelta
Deal found 31/3£869
Thu 24/717:35SOU - IAH
1 stop25h 40mKLM
Sun 27/715:30IAH - SOU
1 stop19h 30mKLM
Deal found 1/4£1,270

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 1 April 2025.
Use the filters below to find and compare flights from Portsmouth to Houston that are best for you.

Fly from

Portsmouth

Fly to

Houston

Route

Depart

Return

Price

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 24/4

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Mon 28/4

15:30-17:00

1 stop19h 30m

£864

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Thu 24/4

09:20-23:08

2 stops19h 48m

Houston Hobby

Mon 28/4

06:00-08:50

2 stops20h 50m

£869

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 24/7

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Sun 27/7

15:30-17:00

1 stop19h 30m

£1,270

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Fri 18/4

16:25-13:05

3 stops50h 40m

£490

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Fri 18/4

09:20-13:15

1 stop33h 55m

£1,606

Flights are sorted by cheapest return flights first.

Deals found on 30/3

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 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 £765). Flying from Portsmouth to Houston in July is currently the most expensive (average of £1,114). 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 1 April 2025.

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.

Rainfall in Houston by month

Plan your trip to Houston by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Houston ranges from 81.0 - 150.0 inches per month. June is typically the wettest month, when rainfall can reach 150.0 mm. February is typically the driest time to visit Houston when rainfall is around 81.0 mm.

Temperature in Houston by month

Plan your trip to Houston by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Houston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 12.0 C).

Reviews of airlines servicing Houston

Get insights into the airlines that provide service to Houston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Houston. Reviews last updated 1 April 2025.

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
8.0
Very Good

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.
  • 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 £765). Flying from Portsmouth to Houston in July is currently the most expensive (average of £1,114). 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

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.

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 1 April 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£365Average£574FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
WestJetCheapest£397Average£491FlexibilityNo cancel feeOn-time60%
Search WestJet flights
JetBlueCheapest£472Average£599FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Scandinavian AirlinesCheapest£499Average£663FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IberiaCheapest£510Average£828FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£519Average£654FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£527Average£828FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£557Average£965FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£598Average£864FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£620Average£793FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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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.

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

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