$625 Cheap Gulf Air flights London (LHR) to Samui Intl. Airport (USM)

View $625 flight on Thu, Jan 29, 2026Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

$625 Cheap Gulf Air flights London (LHR) to Samui Intl. Airport (USM)

Prices were available within the past 7 days and start at $625 for one-way flights and $1,109 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Gulf Air
Thu, Jan 29 - Sat, Feb 14
LHR
London
USM
Koh Samui
$1,109 Roundtrip, found 20 hours ago
$1,109
Roundtrip
found 20 hours ago
Select Gulf Air flight, departing Thu, Jan 29 from London to Koh Samui, returning Sat, Feb 14, priced at $1,109 found 20 hours ago
Flights from London (LHR) to Samui Intl. Airport (USM)
Origin airport
Heathrow
Destination airport
Samui Intl. Airport
Airlines serving
Air France, Austrian Airlines, British Airways, Cathay Pacific, EVA Airways, Etihad Airways, KLM, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Thai Airways International, Turkish Airlines
Popular airline
Singapore Airlines
Distance
6148 mi

Frequently asked questions

How much is a Gulf Air flight from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
You can discover budget-friendly return Gulf Air flights from $1,109 from LHR to USM by organizing your results from "Price (lowest to highest)" on Expedia. Or look for options from $625 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from LHR to USM with Gulf Air?
Look for one-way or round-trip flights to Koh Samui in October or September. You could find cheaper fares with Gulf Air during these off-season months.
What is the cheapest time to book flights from Heathrow Airport (LHR) to Ko Samui Airport (USM) with Gulf Air?
Check for Gulf Air flights from LHR to USM about one month before you want to leave. The most affordable time to reserve an international flight is usually 18 to 29 days ahead of your travel date when you can save 17% versus booking four to five months in advance. Regardless of itinerary or ticket type, the best day of the week to book international airfare is usually Sunday. Friday can be the most expensive. Passengers booking on a Sunday can save 17% on average compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Gulf Air fly nonstop from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
Fill in your dates, click search and check "Nonstop" on Expedia to find any direct flights from LHR to USM with Gulf Air or another carrier.
What is the earliest Gulf Air flight from LHR to USM?
Sort your results by "Morning" and "Early Morning" to see the earliest flights from LHR to USM. Heading off early means you're 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Gulf Air fly into in Koh Samui?
Ko Samui Airport (USM) is the main Koh Samui hub for Gulf Air flights from Heathrow Airport (LHR).
What kind of luggage can I take on a Gulf Air flight from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
For checked luggage, you can bring 2 checked-in bags weighing up to 50 lb with dimensions not exceeding 29 inches x 20 inches x 12 inches. You can also travel with 1 cabin bag on board when flying standard economy from LHR to USM with Gulf Air. This carry-on must weigh less than 19 lb and be no larger than 17 inches x 15 inches x 11 inches. Going above these restrictions can mean additional fees, so read Gulf Air's baggage allowance guidelines before packing.
Why fly with Gulf Air from LHR to USM?
A rewarding loyalty program and the opportunity to collect points through Gulf Air FalconFlyer are the start of the reasons to jet off from LHR to USM with Gulf Air. Plus, when you sign up to our One Key™ program, you can earn OneKeyCash™* in addition to Gulf Air's loyalty program earnings. It's yours to spend on your next adventure.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Gulf Air flight from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
Depending on your fare type, a fee generally applies if you cancel or change your flight more than 24 hours after it's been confirmed. To find flexible plane tickets, select our "Changes included" and "No cancel fee" boxes when you look for flights. For additional information on canceling or changing your reservation, go to "Trips," select your flight and tick "Manage Booking."

Explore a world of travel with Expedia

*Available to One Key members.