Thai Airways allowance at a glance
| Bag | Maximum size | Maximum weight | Notes |
|---|---|---|---|
| Carry-on | 22x18x10 in56x45x25 cm | 7 kg | 1 hand carry bag per passenger, all cabins, up to 7kg. Dimensions include wheels, handles, and side pockets. No separate personal item is published on Thai's carry-on page. Star Alliance Gold members in First or Business, on a journey with 2+ Star Alliance carriers, get 1 additional cabin bag at the same limits. |
| Checked bag | 62 (Royal First/Royal Silk and Economy, US/Canada routes) in158 (62in) linear per piece, US/Canada routes cm | Royal First/Royal Silk: 70lb x2 pieces free. Economy: 50lb x2 pieces free. lbRoyal First/Royal Silk: 32kg (70lb) x2 pieces free. Economy: 23kg (50lb) x2 pieces free. Infant not occupying a seat: 23kg (50lb), 115cm/45in max. kg |
Thai Airways checked bag fees
| Fee | Amount |
|---|---|
| Overweight bag | Charged only for the 23kg tier, 23-32kg range, at the applicable Airport Zone Rate (exact USD figure not published on Thai's excess baggage page). The 32kg tier has no overweight option; some countries bar handlers from lifting heavier. |
| Oversize bag | 158-200cm (62-79in): 1x Airport Zone Rate. 200-330cm (79-130in), bulky baggage: an additional 1x Airport Zone Rate on top. Exact USD zone figures not published for the Piece Concept table. |
US/Canada routes use the Piece Concept (bag count), not the Weight Concept used on most of Thai's network. Royal First and Royal Silk Class: 2 free checked pieces at 32kg/70lb each. Premium Economy Plus, Economy Plus, and Economy Class: 2 free checked pieces at 23kg/50lb each. Royal Orchid Plus Gold Card and Platinum members get 1 extra checked piece in any class. Purchased additional pieces follow the same 32kg or 23kg cap by cabin, capped at 158cm/62in.
This page goes deeper on one part of the policy. The full record is at Thai Airways Baggage Rules.
Thai Airways prices extra baggage by weight, not by a flat fee per bag. International rates run USD 12 to USD 70 per kilogram, depending on the zones you fly between.
Domestic Thailand rates run THB 55 to THB 125 per kilogram. That structure catches travelers off guard.
The Thai Airways extra baggage price on a Bangkok to London ticket looks nothing like the price on a Chiang Mai hop.
The Thai Airways baggage record covers the free checked allowance by fare and cabin.
This page goes deeper on what happens once you go over that allowance, plus the routes where a different pricing model applies entirely.
How the excess baggage charge actually works
Thai Airways runs two separate systems. Which one applies depends on your route, not your fare.
On the airline’s own excess baggage page, purely domestic sectors and any trip starting in Bangkok are billed in Thai baht per kilogram over the free limit.
International sectors are billed in US dollars per kilogram instead. The rate depends on a zone to zone matrix, not a single number.
Working out the Thai Airways extra baggage price ahead of time means checking both tables below. They use different currencies and different logic.
Domestic Thailand rates, per kilogram over the allowance
| Destination | Rate from Bangkok (THB per kg) |
|---|---|
| Chiang Mai | 60 |
| Chiang Rai | 70 |
| Hat Yai | 80 |
| Khon Kaen | 55 |
| Krabi | 70 |
| Phuket | 70 |
Thai Airways also lists a Bangkok to Chiang Mai to Phuket connection at THB 125 per kilogram. A routing through a second Thai city can cost more than a direct flight.
International rates, per kilogram over the allowance
For sectors within one region, and between neighboring regions, the carrier sets a USD per kilogram rate based on the zone you depart from and the zone you land in.
| From zone | To Zone 1 | To Zone 2 | To Zone 3 | To Zone 4 | To Zone 5 |
|---|---|---|---|---|---|
| Zone 1 | 12 | 15 | 40 | 45 | 70 |
| Zone 2 | 15 | 40 | 45 | 55 | 70 |
Published rates run as low as USD 12 per kilogram on a short regional hop. They run as high as USD 70 per kilogram between distant zones.
The same overweight bag can cost very different amounts depending on the itinerary. Thai Airways converts the USD figure to local currency at its own banker’s selling rate on the day the bag is charged.
A 5 kg overage priced at USD 12 per kilogram comes to USD 60. The same 5 kg at USD 70 per kilogram comes to USD 350.
That gap is the real shape of the Thai Airways extra baggage price on this carrier.
Prepaying online versus paying at the counter
Thai Airways lets ticketed passengers buy extra baggage in advance through its online excess baggage tool inside Manage My Booking.
The price online matches the airport rate. The advantage is skipping the counter line, not a lower price, since the carrier states the airport rate applies to anyone without a prepaid transaction.
Group bookings, standby passengers, infants and mileage upgrade tickets cannot buy excess baggage online. Those travelers pay at check-in instead.
Weighing your own bags before you leave home with something like the Etekcity digital luggage scale tells you the number to expect before you reach that screen.
Overweight and oversize limits and what they cost
No single piece can weigh more than 32 kg, 70 lb, on Thai Airways. None of the rates above buy a way around that ceiling.
A bag over 32 kg has to be split into two pieces, or shipped as cargo instead.
On size, no checked piece can measure more than 330 cm, 130 in, total linear dimensions.
Airports of Thailand also limits what its X-ray machines at Bangkok, Chiang Mai, Chiang Rai, Phuket and Hat Yai can scan: 70 by 80 by 80 cm.
An oversize bag at those airports may be opened for a manual security check as a result.
Thai Airways caps checked baggage at ten pieces per passenger. Anything beyond that flies on a space available basis and can be delayed.
The carrier’s own page does not print a separate flat oversize fee on top of the per kilogram rate for these routes. Budget by weight first.
Use your fare’s built in allowance before you pay extra
The Thai Airways baggage record lists the free pieces by cabin.
Royal First and Royal Silk Class get two pieces at 32 kg, 70 lb, each. Premium Economy Plus, Economy Plus and Economy Class get two pieces at 23 kg, 50 lb, each.
Royal Orchid Plus Gold Card and Platinum members get one extra free checked piece in any class. That is often the cheapest way to avoid the excess baggage charge entirely.
Star Alliance Gold members in a premium cabin, on a trip with two or more Star Alliance carriers, also get an extra cabin bag at the standard carry-on limits.
That extra cabin bag can absorb items you might otherwise have checked.
On US and Canada routes the free allowance is priced in per piece rather than by weight. The piece caps matter more there than the excess baggage table above.
How Thai Airways compares to a nearby rival
Cathay Pacific’s baggage fee structure is a useful comparison for a traveler weighing a Bangkok stopover against a Hong Kong one.
Both carriers serve overlapping long haul markets from Southeast Asia. Where they differ is transparency before you reach the airport.
Thai Airways publishes its full zone matrix. That lets you estimate a cost in advance rather than wait for a per itinerary quote.
Practical ways to avoid the charge
- Weigh every checked bag at home first. A scale that reads within a kilogram of the airport scale prevents a surprise at check-in.
- Move weight between two checked pieces before you reach the counter. Thai Airways charges by piece, not by combined weight, on most fares.
- Check whether your fare, elite tier or partner status already includes an extra piece before paying the excess baggage rate.
- Compare the excess baggage cost against buying a bag online in advance for the same trip.
The site’s own guide to avoiding baggage fees covers packing and fare tricks that apply broadly.
Readers connecting through the US or Canada should also check the checked baggage fee comparisons for how the piece based system changes what counts as free.
A card that waives the first bag fee, tracked on the site’s credit cards that cover baggage fees page, applies mainly to domestic US carriers.
Check the card’s own terms for international partners before counting on it here.
The bottom line
The lowest Thai Airways extra baggage price is the one you never pay. Stay inside your fare’s free allowance, since the per kilogram excess rate scales fast on longer international itineraries.
When you do need to check more, prepay online at the same published rate to skip the counter. Weigh everything before you leave home so the number at check-in is not a surprise.
Common questions
Does Thai Airways charge extra for checked baggage over the free allowance?
Yes. Excess weight is billed per kilogram, in Thai baht on domestic routes and in US dollars on international routes based on a zone to zone table.
Can I prepay for extra baggage on Thai Airways before I fly?
Yes, through Manage My Booking, at the same rate charged at the airport counter.
What is the maximum weight for a single checked bag on Thai Airways?
32 kg, 70 lb, per piece. Heavier items must be split into two pieces or shipped as cargo.
Does Star Alliance Gold status give extra baggage on Thai Airways?
It gives an extra cabin bag in premium cabins on multi carrier Star Alliance trips, not extra checked weight.
How many checked bags can I bring on Thai Airways?
Up to ten pieces per passenger, with anything beyond that carried on a space available basis.
Does prepaying online cost less than paying at the Thai Airways counter?
No. The online price matches the airport rate; prepaying only saves time at check-in.
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