Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Glasgow Intl Airport to Portsmouth from £34

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 16/8. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — LHR
13 Jul — 20 Jul1
1 adult

Cheapflights Tip: The best prices from Glasgow Intl to Portsmouth are usually found in March or February, booked 67 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Glasgow Intl to Portsmouth

Keep the following information in mind while searching for Glasgow Intl to Portsmouth flight deals. Data was last updated 8 July 2025.

Round-trip from

£59

One-way from

£34

Popular in

July

Cheapest in

March

Average price

£155
easyJet
  • easyJet
  • 6/9-13/9
  • Nonstop
  • 2h 45m total
  • Glasgow to Portsmouth
Search Deals
easyJet
  • easyJet
  • 16/8
  • Nonstop
  • 1h 20m total
  • Glasgow to Portsmouth
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£18 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Glasgow Intl to Portsmouth

Cheapest flights from Glasgow Intl to Portsmouth
Explore the most affordable flight options available from Glasgow Intl to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 July 2025.

Sat 6/906:35GLA - SOU
Nonstop1h 20measyJet
Sat 13/908:25SOU - GLA
Nonstop1h 25measyJet
Deal found 6/7£59
Mon 25/821:50GLA - SOU
1 stop10h 50mMultiple Airlines
Sun 31/821:30SOU - GLA
Nonstop1h 25mMultiple Airlines
Deal found 7/7£118

Cheapflights Fare Finder

Customise your flight search to find flights from Glasgow Intl to Portsmouth 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 8 July 2025.
Use the filters below to find and compare flights from Glasgow Intl Airport to Portsmouth that are best for you.

Fly from

Glasgow Intl

Fly to

Portsmouth

Route

Depart

Return

Price

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sat 6/9

06:35-07:55

Nonstop1h 20m

Southampton Eastleigh

Sat 13/9

08:25-09:50

Nonstop1h 25m

£59

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Mon 25/8

21:50-08:40

1 stop10h 50m

Southampton Eastleigh

Sun 31/8

21:30-22:55

Nonstop1h 25m

£118

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sat 16/8

06:35-07:55

Nonstop1h 20m

£34

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Tue 15/7

20:10-08:05

1 stop11h 55m

£106

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sun 24/8

21:55-09:10

1 stop11h 15m

£109

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sat 13/9

21:15-16:05

2 stops18h 50m

£211

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sun 9/11

11:20-09:35

3 stops22h 15m

£341

Flights are sorted by cheapest return flights first.

Deals found on 7/7

Best time to book a flight from Glasgow Intl to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Glasgow Intl 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 Glasgow Intl Airport to Portsmouth

How far ahead should I book a flight from Glasgow Intl Airport to Portsmouth?

Use this chart to determine the optimal time to book a return flight from Glasgow Intl to Portsmouth. Price data was last updated on 27 June 2025.

The best time to book flights from Glasgow Intl Airport to Portsmouth is 67 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Glasgow Intl Airport to Portsmouth?

Currently, January is the cheapest month in which you can book a flight from Glasgow Intl Airport to Portsmouth (average of £112). Flying from Glasgow Intl Airport to Portsmouth in August is currently the most expensive (average of £164). 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 GLA to P0R?

Find hourly flight availability from Glasgow Intl to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 8 July 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Glasgow Intl Airport to Portsmouth as you normally would.

What is the cheapest day to fly from Glasgow Intl Airport to Portsmouth?

Use this chart to determine the cheapest time to fly return from Glasgow Intl to Portsmouth. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their Glasgow Intl Airport to Portsmouth flight should consider departing on Tuesday at midday when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. 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 Portsmouth. Reviews last updated 8 July 2025.
Read reviews from past customers who have flown with Aer Lingus, easyJet, andBritish Airways from Glasgow Intl Airport to Portsmouth. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.1
Good
1,151 reviews
Check prices

Comfort

7.0

Boarding

7.2

Crew

8.0

Food

6.4

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
6.0
Good

Tim Hunter,May 2025

LHR - DUB

In the economy section one of the bathrooms was reserved for first class which made for very long lines in for the bathrooms. The temperature for the flight was very cold. I ended up catching a mild cold on the way home. No blankets were handed out / offered. The food service was OK but no napkins were given with the meals -- very weird. The crew as OK but definitely not nice and welcoming.
Aer Lingus
7.1
Good
1,151 reviews
Aer Lingus
7.1
Good
1,151 reviews
Check prices

Comfort

7.0

Boarding

7.2

Crew

8.0

Food

6.4

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
6.0
Good

Tim Hunter,May 2025

LHR - DUB

In the economy section one of the bathrooms was reserved for first class which made for very long lines in for the bathrooms. The temperature for the flight was very cold. I ended up catching a mild cold on the way home. No blankets were handed out / offered. The food service was OK but no napkins were given with the meals -- very weird. The crew as OK but definitely not nice and welcoming.
easyJet
6.9
Okay
1,816 reviews
Aer Lingus
7.1
Good
1,151 reviews
Check prices

Comfort

7.0

Boarding

7.2

Crew

8.0

Food

6.4

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
6.0
Good

Tim Hunter,May 2025

LHR - DUB

In the economy section one of the bathrooms was reserved for first class which made for very long lines in for the bathrooms. The temperature for the flight was very cold. I ended up catching a mild cold on the way home. No blankets were handed out / offered. The food service was OK but no napkins were given with the meals -- very weird. The crew as OK but definitely not nice and welcoming.
British Airways
6.6
Okay
7,095 reviews
Aer Lingus
7.1
Good
1,151 reviews
Check prices

Comfort

7.0

Boarding

7.2

Crew

8.0

Food

6.4

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
6.0
Good

Tim Hunter,May 2025

LHR - DUB

In the economy section one of the bathrooms was reserved for first class which made for very long lines in for the bathrooms. The temperature for the flight was very cold. I ended up catching a mild cold on the way home. No blankets were handed out / offered. The food service was OK but no napkins were given with the meals -- very weird. The crew as OK but definitely not nice and welcoming.

Related info for your journey

Find useful and relevant information for your journey from Glasgow Intl to Portsmouth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Glasgow Intl Airport to Portsmouth one-way?

    To fly one-way, consider booking your trip with easyJet, which is currently one of the cheapest options available, starting at £34. Aer Lingus flights start at £106 while deals on British Airways start at £211 one-way.

  • What are the most reliable airlines from Glasgow Intl Airport to Portsmouth?

    The top 3 most reliable airlines when flying from Glasgow Intl Airport to Portsmouth are Iberia (89%), Royal Air Maroc (89%) and Malaysia Airlines (88%).

  • What are the cheapest flights from Glasgow Intl Airport to Portsmouth?

    On average you can expect to pay £1,491 for a flight from Glasgow Intl Airport to Portsmouth. The cheapest flight overall is £45 while the most popular route, (Glasgow Intl - Southampton Eastleigh) is currently priced at £61.

  • Can I find deals for flights from Glasgow Intl to Portsmouth that include hotel bookings?

    Yes. In addition to deals on Glasgow Intl to Portsmouth flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Glasgow Intl to Portsmouth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow Intl to Portsmouth.

  • Can I find deals for business class flights from Glasgow Intl to Portsmouth?

    Yes. Cheapflights offers flight deals from Glasgow Intl to Portsmouth 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 Glasgow Intl Airport to Portsmouth?

    Currently, January is the cheapest month in which you can book a flight from Glasgow Intl Airport to Portsmouth (average of £112). Flying from Glasgow Intl Airport to Portsmouth in August is currently the most expensive (average of £164). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Glasgow Intl to Portsmouth

Discover the top 3 airlines that operate flights from Glasgow Intl to Portsmouth. 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 8 July 2025.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£42Average£85FlexibilityNo cancel feeOn-time86%
Search easyJet flights
British AirwaysCheapest£47Average£128FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£191Average£310FlexibilityNo cancel feeOn-time75%
Search KLM 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 Glasgow Intl to Portsmouth?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Glasgow Intl to Portsmouth. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Glasgow Intl to Portsmouth for you. Better yet — we are completely free to use.

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

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

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

Yes, Cheapflights offers price alerts on Glasgow Intl to Portsmouth flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights