Cheap flights from Glasgow Intl Airport to London Heathrow Airport
GLA — LHR
25 Feb — 4 Mar1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Glasgow Intl to London Heathrow are usually found in March or January, booked 85 days in advance, depart on a Monday or Wednesday and return on a Wednesday
Find flight deals from Glasgow Intl to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Glasgow Intl (GLA) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 26 January 2026.
Popular in
June
Cheapest in
March
Average price
C$ 203
Good round-trip deal
C$ 230 or less
Good one-way deal
C$ 148 or less
Highest demand for flights based on searches. 10% potential increase in price (C$ 33 potential increase over avg. RT price).
Best time to book a flight from Glasgow Intl to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Glasgow Intl with our price prediction graph.
Estimated round-trip 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 London Heathrow Airport
Prices
Airlines
Delays
How far ahead should I book a flight from Glasgow Intl Airport to London Heathrow Airport?
Use this chart to determine the optimal time to book a round-trip flight from Glasgow Intl to Heathrow. Price data was last updated on 23 January 2026.
The price you pay for your flight from Glasgow Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 85 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Glasgow Intl Airport to London Heathrow Airport?
Currently, September is the cheapest month in which you can book a flight from Glasgow Intl Airport to London Heathrow Airport (average of C$ 126). Flying from Glasgow Intl Airport to London Heathrow Airport in May is currently the most expensive (average of C$ 147). 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 LHR?
Find hourly flight availability from Glasgow Intl 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 26 January 2026.
It’s typically best to fly out from Glasgow Intl Airport to London Heathrow Airport at noon. Doing so could potentially save you 14% on the flight price compared to flying in the morning, which is usually more expensive.
Weekly flight availability from Glasgow Intl Airport to London Heathrow Airport
Explore weekly flight availability from Glasgow Intl to Heathrow. 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 26 January 2026.
The most flights from GLA to LHR are scheduled on a Friday (53 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (4 on average).
How often are flights from Glasgow to London delayed?
About 11% of weekly flights between Glasgow and London have experienced delays in the past year, with the average delay time being 95 minutes.
What is the most punctual flight time for Glasgow to London flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Glasgow to London flights?
Over the past year, British Airways has had the lowest number of delays on this route, with just 11% of flights being delayed.
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 26 January 2026.
See what other customers who have flown with British Airways from Glasgow Intl Airport to London Heathrow Airport have to say. 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.
I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.
I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.
Related info for your journey
Find useful and relevant information for your journey from Glasgow Intl to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What is the cheapest airline to fly from Glasgow Intl Airport to London Heathrow Airport round-trip?
Flying on British Airways is currently your cheapest option to London Heathrow Airport, with prices starting at C$ 143. You may be able to fly from Glasgow Intl Airport to London Heathrow Airport for 36% less than the average price by searching for this airline.
What are the most reliable airlines from Glasgow Intl Airport to London Heathrow Airport?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Glasgow Intl Airport to London Heathrow Airport on time: American Airlines (86%), LATAM Airlines (86%), Qatar Airways (83%).
Can I find deals for flights from Glasgow Intl to Heathrow that include hotel bookings?
Yes. In addition to deals on Glasgow Intl to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Glasgow Intl to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow Intl to Heathrow.
Can I find deals for business class flights from Glasgow Intl to Heathrow?
Yes. Cheapflights offers flight deals from Glasgow Intl to Heathrow 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 London Heathrow Airport?
Currently, September is the cheapest month in which you can book a flight from Glasgow Intl Airport to London Heathrow Airport (average of C$ 126). Flying from Glasgow Intl Airport to London Heathrow Airport in May is currently the most expensive (average of C$ 147). 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.
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 26 January 2026.
Browse through other flights departing from Glasgow Intl. Flights are based on user searches made on Cheapflights and were last updated on 26 January 2026.
Discover the top airline that operate flights from Glasgow Intl to Heathrow. 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 629,999 searches. Data last updated 26 January 2026.
Find the best flight deals on Cheapflights, where travelers 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 Heathrow?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Glasgow Intl to Heathrow. 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 Heathrow?
Cheapflights helps you find that perfect flight to Heathrow from Glasgow Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Glasgow Intl to Heathrow with no change fees?
Yes, we can. To see specific flights from Glasgow Intl to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from Glasgow Intl to Heathrow become cheaper?
Yes! Start tracking prices for Glasgow Intl to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.
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