How long is the flight from Portsmouth to Houston?

A quick flight from Portsmouth to Houston can take about 25h 40m. KLM provides one of the quickest options available for as low as £716. Airlines will cover a distance of 4799 mi. This flight may include one or multiple stops.

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.

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).

What are the most popular airlines that fly from Portsmouth to Houston?

The most popular airlines flying from Portsmouth to Houston are American Airlines, Air Canada and Finnair. Something to consider prior to booking your flight.

How far in advance should I book a flight from Portsmouth to Houston?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 38 days in advance, which can save you up to 70% on flights from Portsmouth to Houston compared to booking the week you need them. Waiting 38 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £628. For sooner than that we have options available in the next 3 days from £895.

What is the cheapest month to fly from Portsmouth to Houston?

March is one of the best times of the year to fly to Houston from Portsmouth. Prices for March average £706 per person but you can even find prices for as low as £496. The most expensive prices can be found in the month of July. Opting for a March flight can save you 30% on your journey compared to booking in July

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.

£341+ Cheap Flights from Portsmouth to Houston

Cheap flight deals from Portsmouth to Houston

Round-trip from	£715
One-way from	£341
Popular in	July
Cheapest in	March
Average price	£639

KLM
1/10-23/10
2 total stops
53h 25m total
Portsmouth to Houston

Search Deals

2/10
2 total stops
32h 43m total
Portsmouth to Houston

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£91 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£15 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

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 16 September 2025.

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Thu 23/1015:30IAH - SOU

1 stop19h 30mKLM

Deal found 14/9£715

Wed 1/1017:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1012:55IAH - SOU

2 stops22h 05mDelta

Deal found 14/9£716

Thu 2/1017:35SOU - IAH

1 stop25h 40mKLM

Thu 23/1009:42IAH - SOU

2 stops17h 03mKLM

Deal found 14/9£718

Wed 1/1009:20SOU - HOU

2 stops19h 17mDelta

Thu 23/1006:00HOU - SOU

2 stops20h 45mDelta

Deal found 14/9£720

Thu 2/1009:20SOU - HOU

2 stops19h 17mKLM

Thu 23/1010:13HOU - SOU

2 stops16h 32mKLM

Deal found 14/9£726

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Wed 22/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1013:29IAH - SOU

2 stops21h 31mDelta

Deal found 14/9£745

Wed 1/1017:35SOU - IAH

1 stop25h 40mKLM

Sat 25/1015:30IAH - SOU

1 stop12h 20mKLM

Deal found 14/9£748

Thu 2/1017:35SOU - IAH

1 stop25h 40mDelta

Fri 24/1010:50IAH - SOU

2 stops15h 55mDelta

Deal found 14/9£748

Tue 30/909:20SOU - IAH

2 stops16h 46mDelta

Wed 22/1011:49IAH - SOU

2 stops14h 56mDelta

Deal found 14/9£750

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Fri 24/1010:50IAH - SOU

2 stops15h 55mKLM

Deal found 14/9£751

Thu 2/1009:20SOU - HOU

2 stops19h 17mDelta

Fri 24/1006:00HOU - SOU

2 stops20h 45mDelta

Deal found 14/9£753

Best flights from Portsmouth to Houston
Discover carefully curated flight deals from Portsmouth to Houston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 September 2025.

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Thu 23/1015:30IAH - SOU

1 stop19h 30mKLM

Deal found 14/9£715

Wed 1/1017:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1012:55IAH - SOU

2 stops22h 05mDelta

Deal found 14/9£716

Thu 2/1017:35SOU - IAH

1 stop25h 40mKLM

Thu 23/1009:42IAH - SOU

2 stops17h 03mKLM

Deal found 14/9£718

Wed 1/1009:20SOU - HOU

2 stops19h 17mDelta

Thu 23/1006:00HOU - SOU

2 stops20h 45mDelta

Deal found 14/9£720

Thu 2/1009:20SOU - HOU

2 stops19h 17mKLM

Thu 23/1010:13HOU - SOU

2 stops16h 32mKLM

Deal found 14/9£726

Thu 2/1017:35SOU - IAH

1 stop25h 40mDelta

Wed 22/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Wed 22/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Fri 3/1009:20SOU - HOU

2 stops19h 17mKLM

Thu 23/1018:44HOU - SOU

2 stops16h 16mKLM

Deal found 14/9£824

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Tue 21/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Wed 1/1009:20SOU - HOU

2 stops19h 17mKLM

Fri 24/1010:13HOU - SOU

2 stops16h 32mKLM

Deal found 14/9£878

Sun 5/1018:25SOU - IAH

1 stop24h 50mDelta

Wed 22/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Last-minute flights from Portsmouth to Houston
Discover last-minute flight deals from Portsmouth to Houston. Data last updated 16 September 2025 and is based on user searches.

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Tue 21/1015:30IAH - SOU

1 stop19h 30mDelta

Deal found 14/9£745

Mon 29/917:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1013:29IAH - SOU

2 stops21h 31mDelta

Deal found 14/9£745

Tue 30/909:20SOU - IAH

2 stops16h 46mDelta

Wed 22/1011:49IAH - SOU

2 stops14h 56mDelta

Deal found 14/9£750

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Thu 23/1015:30IAH - SOU

1 stop19h 30mKLM

Deal found 14/9£715

Wed 1/1017:35SOU - IAH

1 stop25h 40mDelta

Thu 23/1012:55IAH - SOU

2 stops22h 05mDelta

Deal found 14/9£716

Wed 1/1009:20SOU - HOU

2 stops19h 17mDelta

Thu 23/1006:00HOU - SOU

2 stops20h 45mDelta

Deal found 14/9£720

Wed 1/1017:35SOU - IAH

1 stop25h 40mKLM

Sat 25/1015:30IAH - SOU

1 stop12h 20mKLM

Deal found 14/9£748

Wed 1/1009:20SOU - IAH

1 stop33h 55mKLM

Fri 24/1010:50IAH - SOU

2 stops15h 55mKLM

Deal found 14/9£751

Thu 2/1017:35SOU - IAH

1 stop25h 40mKLM

Thu 23/1009:42IAH - SOU

2 stops17h 03mKLM

Deal found 14/9£718

Thu 2/1009:20SOU - HOU

2 stops19h 17mKLM

Thu 23/1010:13HOU - SOU

2 stops16h 32mKLM

Deal found 14/9£726

Thu 2/1017:35SOU - IAH

1 stop25h 40mDelta

Fri 24/1010:50IAH - SOU

2 stops15h 55mDelta

Deal found 14/9£748

Thu 2/1009:20SOU - HOU

2 stops19h 17mDelta

Fri 24/1006:00HOU - SOU

2 stops20h 45mDelta

Deal found 14/9£753

One-way flights from Portsmouth to Houston
Search for one-way flight options from Portsmouth to Houston. Find affordable one-way fares based on user searches. Data last updated 16 September 2025.

Thu 2/1020:00SOU - IAH

2 stops32h 43mMultiple Airlines

Deal found 14/9£341

Sun 5/1013:10SOU - IAH

3 stops51h 37mMultiple Airlines

Deal found 14/9£369

Wed 1/1020:00SOU - IAH

3 stops49h 04mMultiple Airlines

Deal found 14/9£386

Fri 3/1019:25SOU - IAH

3 stops45h 19mMultiple Airlines

Deal found 14/9£395

Tue 30/920:00SOU - IAH

3 stops42h 24mMultiple Airlines

Deal found 14/9£403

Sat 4/1008:25SOU - IAH

3 stops44h 18mMultiple Airlines

Deal found 14/9£416

Mon 29/920:30SOU - IAH

3 stops54h 37mMultiple Airlines

Deal found 14/9£425

Thu 2/1020:00SOU - HOU

3 stops43h 49mMultiple Airlines

Deal found 14/9£507

Tue 30/909:20SOU - HOU

2 stops19h 17mDelta

Deal found 14/9£1,565

Mon 29/909:20SOU - HOU

2 stops19h 17mKLM

Deal found 14/9£1,566

Fri 3/1009:20SOU - HOU

2 stops19h 17mDelta

Deal found 14/9£1,607

Fly from

Fly to

Route

Depart

Return

Price

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 1/10

09:20-13:15

1 stop33h 55m

Houston George Bush Intcntl

Thu 23/10

15:30-17:00

1 stop19h 30m

£715

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Wed 1/10

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Thu 23/10

12:55-17:00

2 stops22h 05m

£716

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 2/10

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Thu 23/10

09:42-08:45

2 stops17h 03m

£718

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Wed 1/10

09:20-22:37

2 stops19h 17m

Houston Hobby

Thu 23/10

06:00-08:45

2 stops20h 45m

£720

SouthamptonHouston

SOU - HOU

SOUHOU

Southampton Eastleigh

Thu 2/10

09:20-22:37

2 stops19h 17m

Houston Hobby

Thu 23/10

10:13-08:45

2 stops16h 32m

£726

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Thu 2/10

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Wed 22/10

15:30-17:00

1 stop19h 30m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 29/9

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Wed 22/10

15:30-17:00

1 stop19h 30m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 29/9

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Thu 23/10

15:30-17:00

1 stop19h 30m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Mon 29/9

17:35-13:15

1 stop25h 40m

Houston George Bush Intcntl

Tue 21/10

15:30-17:00

1 stop19h 30m

£745

SouthamptonHouston

SOU - IAH

SOUIAH

Southampton Eastleigh

Sun 5/10

18:25-13:15

1 stop24h 50m

Houston George Bush Intcntl

Wed 22/10

15:30-17:00

1 stop19h 30m

£745

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 37 results

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?

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

How long is the flight from Portsmouth to Houston?
A quick flight from Portsmouth to Houston can take about 25h 40m. KLM provides one of the quickest options available for as low as £716. 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.
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

Alternative routes for Portsmouth to Houston

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Complete your trip

Houston car hire

Houston Hobby Airport car hire

Houston George Bush Intcntl Airport car hire

College Station Easterwood Field Airport car hire

Beaumont Jefferson County Airport car hire

Top 10 airlines flying from Portsmouth to Houston

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest£313	Average£700	FlexibilityNo cancel fee	On-time75%	Search KLM flights
WestJet	Cheapest£378	Average£549	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Virgin Atlantic	Cheapest£378	Average£736	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Icelandair	Cheapest£440	Average£638	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
JetBlue	Cheapest£450	Average£572	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Scandinavian Airlines	Cheapest£475	Average£634	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Lufthansa	Cheapest£494	Average£741	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£500	Average£628	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Austrian Airlines	Cheapest£508	Average£792	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Iberia	Cheapest£518	Average£766	FlexibilityNo cancel fee	On-time77%	Search Iberia flights

Fly with Cheapflights

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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Cheap flights from Portsmouth to Houston from £341

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.

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 16 September 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portsmouth to Houston

Cheapest flights from Portsmouth to HoustonExplore 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 16 September 2025.

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 16 September 2025.

Cheapflights Fare Finder

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

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.

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?

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 16 September 2025.

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?

Can I find deals for flights from Portsmouth to Houston that include hotel bookings?

How can I find direct flights from Portsmouth to Houston?

Can I find deals for business class flights from Portsmouth to Houston?

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

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.

Top 10 airlines flying from Portsmouth to Houston

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How does Cheapflights help users find flights from Portsmouth to Houston?

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Houston?

Can Cheapflights find flights from Portsmouth to Houston with no change fees?

Can Cheapflights notify me if prices for flights from Portsmouth to Houston become cheaper?

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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 16 September 2025.