Cheap flights from Portsmouth to Houston from £946
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. 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 17 October 2025.
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 17 October 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 17 October 2025.
Cheapflights Fare Finder
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
SouthamptonHouston
SOU - IAH
SOUIAH
Southampton Eastleigh
Thu 12/3
18:05-14:30
1 stop25h 25m
Houston George Bush Intcntl
Mon 16/3
07:15-17:00
2 stops28h 45m
SouthamptonHouston
SOU - IAH
SOUIAH
Southampton Eastleigh
Thu 12/3
08:50-22:19
2 stops18h 29m
Houston George Bush Intcntl
Mon 16/3
11:30-08:05
2 stops15h 35m
SouthamptonHouston
SOU - IAH
SOUIAH
Southampton Eastleigh
Fri 27/3
17:30-14:30
1 stop26h 00m
Houston George Bush Intcntl
Tue 31/3
15:30-17:00
1 stop19h 30m
SouthamptonHouston
SOU - HOU
SOUHOU
Southampton Eastleigh
Fri 27/3
08:40-21:46
2 stops18h 06m
Houston Hobby
Tue 31/3
06:00-08:50
2 stops20h 50m
SouthamptonHouston
SOU - IAH
SOUIAH
Southampton Eastleigh
Sun 30/11
20:10-16:55
3 stops50h 45m
SouthamptonHouston
SOU - HOU
SOUHOU
Southampton Eastleigh
Sun 30/11
09:30-18:37
2 stops39h 07m
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?
Currently, May is the cheapest month in which you can book a flight from Portsmouth to Houston (average of £130). Flying from Portsmouth to Houston in July is currently the most expensive (average of £633). 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 17 October 2025.
One of the essential ways to save on airfare from Portsmouth to Houston is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 22% on airfare.
What is the cheapest day to fly from Portsmouth to Houston?
Use this chart to determine the cheapest time to fly return from Portsmouth to Houston. Price data was last updated on 16 December 2024.
Travellers seeking maximum savings on their Portsmouth to Houston flight should consider departing on Monday evenings when fares are most often at their lowest. Saturday at midday flights should be avoided if possible as fares are typically the most expensive at this time.
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.
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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 17 October 2025.
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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.
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.
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