Cheap flights from Portsmouth to London Heathrow Airport from £205
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
Find flight deals from Portsmouth to Heathrow
Cheapest flights from Portsmouth to HeathrowExplore the most affordable flight options available from Portsmouth to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 March 2025.
Explore the most affordable flight options available from Portsmouth to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 March 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Portsmouth to Heathrow 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 27 March 2025.
Use the filters below to find and compare flights from Portsmouth to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SouthamptonLondon
SOU - LHR
SOULHR
Southampton Eastleigh
Mon 12/5
08:05-14:15
1 stop6h 10m
London Heathrow
Thu 15/5
14:20-19:30
1 stop5h 10m
SouthamptonLondon
SOU - LHR
SOULHR
Southampton Eastleigh
Wed 2/7
09:20-20:55
1 stop11h 35m
London Heathrow
Sun 10/8
20:55-08:45
1 stop11h 50m
SouthamptonLondon
SOU - LHR
SOULHR
Southampton Eastleigh
Wed 9/4
08:55-13:00
1 stop4h 05m
London Heathrow
Wed 16/4
15:00-19:10
1 stop4h 10m
SouthamptonLondon
SOU - LHR
SOULHR
Southampton Eastleigh
Sat 10/5
16:25-19:55
2 stops27h 30m
Best time to book a flight from Portsmouth to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Portsmouth with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Portsmouth to London Heathrow Airport
What is the cheapest time of day to fly from P0R to LHR?
Find hourly flight availability from Portsmouth to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 March 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to London Heathrow Airport as you normally would.
Rainfall in Heathrow by month
Plan your trip to Heathrow by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.
Temperature in Heathrow by month
Plan your trip to Heathrow by taking into account the average temperature totals by month.
If weather is an important factor for your trip to London Heathrow Airport, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 27 March 2025.
Comfort
Entertainment
Boarding
Overall
Crew
Food
Reviews
Anonymous,Mar 2025
LBA - AMS
Comfort
Entertainment
Boarding
Overall
Crew
Food
Reviews
Anonymous,Mar 2025
LBA - AMS
Comfort
Entertainment
Boarding
Overall
Crew
Food
Reviews
Anonymous,Mar 2025
LBA - AMS
Related info for your journey
Find useful and relevant information for your journey from Portsmouth to Heathrow. 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 Heathrow
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