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Cheap flights from Glasgow Intl Airport to Portsmouth from £20

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 15/8. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — LHR
31 Jul — 7 Aug1
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 88 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 1 July 2026.

Sat 15/806:00
GLA
-
SOU
Nonstop1h 20m
easyJet
Sat 22/807:50
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 27/6£42
Wed 30/908:55
GLA
-
SOU
Nonstop1h 20m
easyJet
Thu 1/1011:40
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 29/6£45
Sat 15/806:00
GLA
-
SOU
Nonstop1h 20m
easyJet
Sat 29/807:50
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 28/6£51
Tue 29/911:30
GLA
-
SOU
Nonstop1h 20m
easyJet
Thu 1/1011:40
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 29/6£62
Sat 15/806:00
GLA
-
SOU
Nonstop1h 20m
easyJet
Wed 19/810:45
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 1/7£69
Thu 10/909:45
GLA
-
SOU
Nonstop1h 20m
easyJet
Sun 13/910:00
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 30/6£73
Sat 15/806:00
GLA
-
SOU
Nonstop1h 20m
easyJet
Mon 17/808:50
SOU
-
GLA
Nonstop1h 20m
easyJet
Deal found 27/6£78

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 1 July 2026.

Round-trip from

£42

One-way from

£20

Popular in

June

Cheapest in

January

Average price

£147
easyJet
  • easyJet
  • 15/8-22/8
  • Nonstop
  • 2h 40m total
  • Glasgow to Portsmouth
Search Deals
easyJet
  • easyJet
  • 15/8
  • Nonstop
  • 1h 20m total
  • Glasgow to Portsmouth
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£11 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 July 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 1 July 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

Wed 30/9

08:55-10:15

Nonstop1h 20m

Southampton Eastleigh

Thu 1/10

11:40-13:00

Nonstop1h 20m

£45

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sat 15/8

06:00-07:20

Nonstop1h 20m

Southampton Eastleigh

Sat 29/8

07:50-09:10

Nonstop1h 20m

£51

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Thu 10/9

09:45-11:05

Nonstop1h 20m

Southampton Eastleigh

Sun 13/9

10:00-11:20

Nonstop1h 20m

£73

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sat 8/8

06:00-07:20

Nonstop1h 20m

Southampton Eastleigh

Wed 12/8

10:45-12:05

Nonstop1h 20m

£81

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Thu 10/9

09:45-11:05

Nonstop1h 20m

Southampton Eastleigh

Mon 14/9

12:55-14:15

Nonstop1h 20m

£85

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Thu 5/11

07:20-08:40

Nonstop1h 20m

Southampton Eastleigh

Sat 14/11

08:20-09:45

Nonstop1h 25m

£89

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Sat 1/8

06:00-07:20

Nonstop1h 20m

Southampton Eastleigh

Sat 8/8

07:50-09:10

Nonstop1h 20m

£98

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Fri 16/10

12:35-13:55

Nonstop1h 20m

Southampton Eastleigh

Sun 18/10

12:35-07:25

1 stop18h 50m

£107

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Fri 11/9

12:35-13:55

Nonstop1h 20m

Southampton Eastleigh

Mon 14/9

12:55-14:15

Nonstop1h 20m

£112

GlasgowSouthampton

GLA - SOU

GLASOU

Glasgow Intl

Fri 18/9

07:05-11:50

1 stop4h 45m

Southampton Eastleigh

Sat 19/9

07:50-09:10

Nonstop1h 20m

£122

Flights are sorted by cheapest return flights first.

Deals found on 29/6

Showing 1-10 of 21 resultsSorted by cheapest first
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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

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 1 July 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.

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 1 July 2026.

The most flights from GLA to P0R are scheduled on a Wednesday (44 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (1 on average).

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

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 27 June 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.

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 1 July 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
1,914 reviews
Check prices

Comfort

6.8

Food

5.9

Overall

6.9

Crew

7.7

Entertainment

5.5

Boarding

6.7

Reviews

1 / 20
10.0
Excellent

Kevin,Jun 2026

MRS - BRS

On time departure. Clean comfortable aircraft and fantastic friendly crew.
easyJet
6.9
Okay
1,914 reviews
easyJet
6.9
Okay
1,914 reviews
Check prices

Comfort

6.8

Food

5.9

Overall

6.9

Crew

7.7

Entertainment

5.5

Boarding

6.7

Reviews

1 / 20
10.0
Excellent

Kevin,Jun 2026

MRS - BRS

On time departure. Clean comfortable aircraft and fantastic friendly crew.

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 £45, 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 British Airways (83%), Finnair (83%) and Japan Airlines (83%).

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

    On average you can expect to pay £3,460 for a flight from Glasgow Intl Airport to Portsmouth. The cheapest flight overall is £90 while the most popular route, (Glasgow Intl - Southampton Eastleigh) is currently priced at £42.

  • 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.

See more FAQs

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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 1 July 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£18Average£89FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£26Average£46FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£65Average£147FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£164Average£214FlexibilityNo 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?

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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