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Cheap flights from Glasgow Intl Airport to Portsmouth from £21

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — LHR
27 Apr — 4 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Glasgow Intl to Portsmouth are usually found in January or December, booked 77 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Glasgow Intl to Portsmouth

Enter your travel dates to find the best prices.

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 28 March 2026.

Fri 17/406:05
GLA
-
SOU
Nonstop1h 20m
easyJet
Wed 29/412:30
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 26/3£49
Sat 25/406:00
GLA
-
SOU
Nonstop1h 20m
easyJet
Tue 28/413:25
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 26/3£53
Wed 22/410:40
GLA
-
SOU
Nonstop1h 20m
easyJet
Sat 25/407:50
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 26/3£59
Fri 8/506:05
GLA
-
SOU
Nonstop1h 20m
easyJet
Sat 16/507:50
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 27/3£60
Wed 22/410:40
GLA
-
SOU
Nonstop1h 20m
easyJet
Tue 28/413:25
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 26/3£61
Tue 21/411:30
GLA
-
SOU
Nonstop1h 20m
easyJet
Sat 25/407:50
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 26/3£63
Tue 21/411:30
GLA
-
SOU
Nonstop1h 20m
easyJet
Tue 28/413:25
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 26/3£64
Sun 26/408:05
GLA
-
SOU
Nonstop1h 20m
easyJet
Tue 28/413:25
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 26/3£65
Wed 19/808:55
GLA
-
SOU
Nonstop1h 20m
easyJet
Sat 29/807:50
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 24/3£67
Fri 13/1115:50
GLA
-
SOU
Nonstop1h 20m
easyJet
Mon 16/1112:05
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 27/3£69
Sat 25/406:00
GLA
-
SOU
Nonstop1h 20m
easyJet
Sun 26/410:00
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 26/3£70
Mon 8/611:05
GLA
-
SOU
Nonstop1h 20m
easyJet
Tue 16/613:25
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 25/3£72

Find 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 28 March 2026.

Round-trip from

£49

One-way from

£21

Popular in

October

Cheapest in

January

Average price

£94
easyJet
  • easyJet
  • 17/4-29/4
  • Nonstop
  • 2h 40m total
  • Glasgow to Portsmouth
Search Deals
easyJet
  • easyJet
  • 8/5
  • Nonstop
  • 1h 20m total
  • Glasgow to Portsmouth
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£13 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 March 2026
Search Deals

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 28 March 2026.
Use the filters below to find and compare flights from Glasgow Intl Airport to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Tue 21/4

11:30-12:50

Nonstop1h 20m

Southampton Eastleigh

Tue 28/4

13:25-14:45

Nonstop1h 20m

£78

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Tue 21/4

10:25-11:45

Nonstop1h 20m

Southampton Eastleigh

Sat 25/4

07:50-09:10

Nonstop1h 20m

£79

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Wed 8/4

10:40-12:00

Nonstop1h 20m

Southampton Eastleigh

Wed 15/4

12:30-13:50

Nonstop1h 20m

£81

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Fri 12/6

06:05-07:25

Nonstop1h 20m

Southampton Eastleigh

Sun 14/6

18:20-19:40

Nonstop1h 20m

£83

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Tue 9/6

11:30-12:50

Nonstop1h 20m

Southampton Eastleigh

Mon 15/6

12:55-14:15

Nonstop1h 20m

£99

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Tue 7/4

11:30-12:50

Nonstop1h 20m

Southampton Eastleigh

Tue 14/4

13:25-14:45

Nonstop1h 20m

£101

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Mon 13/4

11:05-12:25

Nonstop1h 20m

Southampton Eastleigh

Sat 18/4

08:50-10:10

Nonstop1h 20m

£105

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Tue 7/4

11:30-12:50

Nonstop1h 20m

Southampton Eastleigh

Sat 11/4

08:50-10:10

Nonstop1h 20m

£110

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Fri 10/4

06:05-07:25

Nonstop1h 20m

Southampton Eastleigh

Sat 11/4

08:50-10:10

Nonstop1h 20m

£112

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Mon 27/4

13:35-14:55

Nonstop1h 20m

Southampton Eastleigh

Tue 28/4

13:25-14:45

Nonstop1h 20m

£115

Flights are sorted by cheapest return flights first.

Deals found on 27/3

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 13 March 2026.

The best time to book flights from Glasgow Intl Airport to Portsmouth is 76 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, February is the cheapest month in which you can book a flight from Glasgow Intl Airport to Portsmouth (average of £29). Flying from Glasgow Intl Airport to Portsmouth in June is currently the most expensive (average of £50). 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 28 March 2026.

It’s typically best to fly out from Glasgow Intl Airport to Portsmouth in the evening. Doing so could potentially save you 35% on the flight price compared to flying in the morning, which is usually more expensive.

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 28 March 2026.

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

How much does it cost for a return flight from Glasgow Intl Airport to Portsmouth?

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 28 March 2026.
Read reviews from past customers who have flown with easyJet 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.
easyJet
6.9
Okay
1,889 reviews
Check prices

Crew

7.6

Boarding

6.7

Comfort

6.7

Overall

6.9

Entertainment

5.5

Food

5.9

Reviews

1 / 20
4.0
Okay

Matt,Sept 2025

JTR - LGW

Boarding was a disaster. They are Nazis with the bags.
easyJet
6.9
Okay
1,889 reviews
easyJet
6.9
Okay
1,889 reviews
Check prices

Crew

7.6

Boarding

6.7

Comfort

6.7

Overall

6.9

Entertainment

5.5

Food

5.9

Reviews

1 / 20
4.0
Okay

Matt,Sept 2025

JTR - LGW

Boarding was a disaster. They are Nazis with the bags.

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.

  • How long is the flight from Glasgow Intl Airport to Portsmouth?

    For as low as £78, easyJet can have you in Portsmouth from Glasgow Intl Airport in 1h 20m. The distance between Glasgow Intl Airport and Portsmouth is about 363 mi. All flights are typically direct.

  • 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 Qatar Airways (93%), British Airways (92%) and Iberia (91%).

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

    On average you can expect to pay £1,666 for a flight from Glasgow Intl Airport to Portsmouth. The cheapest flight overall is £66 while the most popular route, (Glasgow Intl - Southampton Eastleigh) is currently priced at £60.

  • 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, February is the cheapest month in which you can book a flight from Glasgow Intl Airport to Portsmouth (average of £29). Flying from Glasgow Intl Airport to Portsmouth in June is currently the most expensive (average of £50). 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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Top 4 airlines flying from Glasgow Intl to Portsmouth

Discover the top 4 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 28 March 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£18Average£90FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£31Average£51FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£47Average£141FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£164Average£221FlexibilityNo 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.

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