EU261 / UK261 · No win, no fee
TG5811 flight compensation
Thai Airways flight TG5811 is a scheduled service operating from Calgary International Airport to London Heathrow Airport.
Check your TG5811 flightQuick facts
- Flight number
- TG5811
- Airline
- TG
- ICAO airline code
- THA
- Origin airport
- Calgary International Airport
- Destination airport
- London Heathrow Airport
- Distance category
- Long-haul
- EU261 protection
- No
- UK261 protection
- No
- Aircraft
- A333
- Schedule snapshot
- 2 Sept 2026, 01:55 – 2 Sept 2026, 10:50
About TG5811
Passengers travelling on Thai Airways flight TG5811 between Calgary and London may be entitled to compensation if the flight was delayed, cancelled or heavily disrupted.
How much compensation can you receive?
Passengers on TG5811 may be entitled to compensation depending on the route, disruption and final arrival delay.
Passenger rights under EU261
Passenger-rights protection for TG5811 depends on the departure airport, destination, operating airline and circumstances of the disruption.
When are you entitled to compensation?
Eligible passengers travelling on TG5811 may receive compensation when the disruption was within the airline's control and the legal requirements for the Calgary to London route are met.
TG5811 compensation statistics
The statistics below summarise the passenger-rights framework that may apply to TG5811.
Per passenger under EU261.
Arrival delay normally required.
Applies on eligible European flights.
What happens after you submit your claim?
Once your TG5811 claim has been submitted, FlightClaimly guides you through the compensation process.
- 1
Submit your claim
You check your flight, add your passenger details and upload the documents needed to start the case.
- 2
FlightClaimly reviews the case
We review the information and prepare the claim before contacting the airline.
- 3
The airline responds
The airline reviews the claim and may approve, reject or request additional information.
- 4
You receive your payout
If the claim is successful, FlightClaimly helps complete the payout process.
How the claim process works
- 1Check your flight details and tell us what happened.
- 2Confirm whether the disruption may qualify under EU261 or UK261.
- 3Add your passenger details and booking reference.
- 4Sign the authority form so FlightClaimly can handle the claim.
- 5Upload your supporting documents.
- 6FlightClaimly submits the claim and follows up with the airline.
Common TG5811 disruption types
- ✓ Flight delayed more than 3 hours
- ✓ Flight cancelled
- ✓ Missed connection
- ✓ Denied boarding
- ✓ Technical problems
- ✓ Operational disruption
- ✓ Crew shortage
- ✓ Strike
- ✓ Bad weather
Frequently asked questions
Can I claim compensation for a delayed flight?
Yes. If your flight arrived at least three hours late and the disruption was within the airline's control, you may be entitled to compensation under EU261 or UK261.
How much compensation can I receive?
Depending on the flight distance and the circumstances, you may be entitled to €250, €400 or €600 per passenger.
What documents do I need?
Usually your booking confirmation or boarding pass is enough to get started. In some cases we may request additional documentation.
How long does the claim process take?
Every airline is different. Some claims are resolved within a few weeks, while others may take several months if they are disputed.
Do I pay anything upfront?
No. FlightClaimly works on a no win, no fee basis. You only pay if we successfully recover compensation for you.
- Thai Airways (TG)
- Calgary (YYC) → London (LHR)
- approx. 7,014 km · Long-haul (over 3,500 km)
- £520 (UK261), depending on the airline · UK261 depending on the airline · A333 · Suvarnabhumi Airport (BKK)
TG 5811 (TG5811) is sold by Thai Airways. On a codeshare another airline may operate the flight, and the operating airline determines which rules apply.
TG5811 departs from Canada and lands in United Kingdom. If Thai Airways also operates the flight, neither EU261 nor UK261 usually applies. If another airline operates it, that airline decides.
With about 7,014 km between YYC and LHR (long-haul (over 3,500 km)), compensation may be £520 (UK261), depending on the airline, if you are entitled to it. All amounts
Does EU261 apply to Thai Airways flight TG 5811?
No, but UK261 may apply if the operating airline is a UK or EU airline.
Who operates Thai Airways flight TG 5811?
In our data, Thai Airways is the airline selling TG5811. Who actually operates the flight is shown on your ticket or booking confirmation.
Was TG 5811 part of a connecting flight? How is compensation calculated?
Your booking shows this, not the flight number. If TG5811 was part of a connecting journey on one booking, distance is counted from the first departure airport to the final destination, and the delay is counted on arrival at the final destination. The distance band (short-, medium- or long-haul) follows that distance and may then differ from this leg (£520 (UK261), depending on the airline).