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Cheap flights from Glasgow Intl Airport to Portsmouth from £15

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — LHR
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Glasgow Intl to Portsmouth are usually found in March or February, booked 76 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 5 December 2025.

Wed 10/1207:30GLA - SOU
Nonstop1h 20measyJet
Tue 16/1209:20SOU - GLA
Nonstop1h 20measyJet
Deal found 3/12£53
Wed 31/1207:30GLA - SOU
Nonstop1h 20measyJet
Thu 1/117:55SOU - GLA
Nonstop1h 20measyJet
Deal found 3/12£79
Mon 8/1210:05GLA - SOU
Nonstop1h 20measyJet
Tue 9/1209:20SOU - GLA
Nonstop1h 20measyJet
Deal found 3/12£97
Wed 10/1207:45GLA - SOU
1 stop4h 10mMultiple Airlines
Tue 16/1209:20SOU - GLA
Nonstop1h 20mMultiple Airlines
Deal found 3/12£100
Fri 19/1215:50GLA - SOU
Nonstop1h 20measyJet
Tue 23/1209:20SOU - GLA
Nonstop1h 20measyJet
Deal found 4/12£109
Mon 8/1210:05GLA - SOU
Nonstop1h 20measyJet
Mon 15/1212:05SOU - GLA
Nonstop1h 20measyJet
Deal found 4/12£124
Wed 31/1207:30GLA - SOU
Nonstop1h 20mMultiple Airlines
Wed 7/112:25SOU - GLA
1 stop7h 55mMultiple Airlines
Deal found 3/12£126
Mon 15/1223:35GLA - SOU
1 stop12h 20mMultiple Airlines
Wed 17/1220:10SOU - GLA
1 stop13h 55mMultiple Airlines
Deal found 4/12£133
Fri 19/1223:00GLA - SOU
1 stop9h 45mMultiple Airlines
Tue 23/1209:20SOU - GLA
Nonstop1h 20mMultiple Airlines
Deal found 4/12£160

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 5 December 2025.

Round-trip from

£48

One-way from

£15

Popular in

July

Cheapest in

March

Average price

£141
easyJet
  • easyJet
  • 15/1-19/1
  • Nonstop
  • 2h 40m total
  • Glasgow to Portsmouth
Search Deals
easyJet
  • easyJet
  • 3/3
  • Nonstop
  • 1h 20m total
  • Glasgow to Portsmouth
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£13 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 5 December 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

Thu 15/1

16:00-17:20

Nonstop1h 20m

Southampton Eastleigh

Mon 19/1

12:05-13:25

Nonstop1h 20m

£48

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sun 18/1

16:25-17:45

Nonstop1h 20m

Southampton Eastleigh

Sun 25/1

18:20-19:40

Nonstop1h 20m

£55

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Fri 27/2

15:50-17:10

Nonstop1h 20m

Southampton Eastleigh

Sat 14/3

13:55-15:15

Nonstop1h 20m

£57

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Mon 19/1

10:05-11:25

Nonstop1h 20m

Southampton Eastleigh

Mon 26/1

12:05-13:25

Nonstop1h 20m

£58

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Fri 9/1

15:50-17:10

Nonstop1h 20m

Southampton Eastleigh

Mon 12/1

12:05-13:25

Nonstop1h 20m

£59

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Fri 6/3

15:50-17:10

Nonstop1h 20m

Southampton Eastleigh

Sun 8/3

18:20-19:40

Nonstop1h 20m

£64

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Wed 31/12

07:30-08:50

Nonstop1h 20m

Southampton Eastleigh

Thu 1/1

17:55-19:15

Nonstop1h 20m

£79

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sat 28/2

16:05-14:45

1 stop22h 40m

Southampton Eastleigh

Sat 14/3

13:55-15:15

Nonstop1h 20m

£92

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Fri 19/12

15:50-17:10

Nonstop1h 20m

Southampton Eastleigh

Tue 23/12

09:20-10:40

Nonstop1h 20m

£109

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Tue 3/3

07:30-08:50

Nonstop1h 20m

£15

Flights are sorted by cheapest return flights first.

Deals found on 3/12

Showing 1-10 of 19 results
1
2

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 28 November 2025.

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, January is the cheapest month in which you can book a flight from Glasgow Intl Airport to Portsmouth (average of £31). Flying from Glasgow Intl Airport to Portsmouth in June is currently the most expensive (average of £49). 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 5 December 2025.

It’s typically best to fly out from Glasgow Intl Airport to Portsmouth in the evening. Doing so could potentially save you 40% 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 16 December 2024.

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. Monday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Glasgow Intl Airport to Portsmouth

Explore weekly flight availability from Glasgow Intl to Portsmouth. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 5 December 2025.

The most flights from GLA to P0R are scheduled on a Thursday (50 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

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 5 December 2025.
Read reviews from past customers who have flown with KLM and 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.
KLM
7.7
Good
1,430 reviews
Check prices

Food

7.2

Comfort

7.6

Entertainment

7.1

Overall

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,430 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Food

7.2

Comfort

7.6

Entertainment

7.1

Overall

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
easyJet
6.9
Okay
1,848 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Food

7.2

Comfort

7.6

Entertainment

7.1

Overall

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 £48, 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 American Airlines (88%), Finnair (87%) and Japan Airlines (87%).

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

    On average you can expect to pay £1,626 for a flight from Glasgow Intl Airport to Portsmouth. The cheapest flight overall is £64 while the most popular route, (Glasgow Intl - Southampton Eastleigh) is currently priced at £55.

  • 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 £31). Flying from Glasgow Intl Airport to Portsmouth in June is currently the most expensive (average of £49). 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 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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£39Average£87FlexibilityNo cancel feeOn-time86%
Search easyJet flights
British AirwaysCheapest£59Average£133FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£163Average£320FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Glasgow Intl to Portsmouth?

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

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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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