Thai Airways International Flight TG643 Deals & Information (2025/2026)

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Thai Airways International Flight 643 Route Deals From $361

The cheapest prices found with in the last 7 days for return flights were $554 and $361 for one-way flights to Suvarnabhumi Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Jul 20 - Sat, Jul 26
NRT
Narita Intl.
BKK
Suvarnabhumi Intl.
$554 Roundtrip, found 1 day ago
$554
Roundtrip
found 1 day ago
Select Thai Airways International flight, departing Sun, Jul 20 from Narita Intl. to Suvarnabhumi Intl., returning Sat, Jul 26, priced at $554 found 1 day ago

Frequently asked questions

What route does flight number TG643 take?
TG643 jets from Narita Intl. Airport (NRT) to BKK and flies direct. This service generally takes 6 hours and 30 minutes.
How often is TG643 on time?
If you’re flying with Thai Airways flight number TG643 between Narita Intl. Airport (NRT) and Bangkok Airport (BKK-Suvarnabhumi Intl.), 93% of these trips land on schedule. In the rare event of a delay, you can expect to wait approximately 1 hour and 24 minutes on average. Thanks to the air carrier’s top-quality service, this trip has earned a 2.55-star rating.
What terminal does TG643 fly out of?
TG643 runs between Tokyo Airport (NRT-Narita Intl.) and BKK, and those taking this flight usually depart from Terminal 1.
What kind of plane is on flight number TG643?
Prepare to board a Boeing 777 if you’re booked on flight TG643. Most services from Tokyo Narita Airport to BKK are operated using this aircraft type.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your TG643 flight with Travelocity, please visit our Customer Service Portal.