Cheap flights from Bangkok to Kathmandu from $241 BKK, DMK → KTM
Suvarnabhumi Airport (BKK), Don Mueang International Airport (DMK) → Tribhuvan International Airport (KTM)
The cheapest return found recently is $469 with THAI Airways, 23 Apr 2027 – 10 May 2027, found 2 days ago. The cheapest one-way found recently is $241 with China Southern Airlines, 25 Sept 2027, found 3 days ago.
- Cheapest one-way found recently
- $241, found 3 days ago
- Cheapest return found recently
- $469, 23 Apr 2027 to 10 May 2027
- Usual return price
- $465 to $474
- Cheapest month to fly
- March 2027, return fares from $439 found in the last 7 days
- Airlines with nonstop flights
- THAI Airways
Return
The cheapest return fare on each of 7 departure dates is usually $465 to $474.
Cheapest return found recently
$469
23 Apr 2027 – 10 May 2027 · THAI Airways
Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM)
Leaves 10:15 a.m. · Return leaves 6:30 a.m. · 13 h 35 min of travel, both ways together
out nonstop, back 1 stop · via Indira Gandhi International Airport (DEL)
found 2 days ago
Cheapest nonstop return
$544
23 Apr 2027 – 10 May 2027 · THAI Airways
Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM)
Leaves 10:15 a.m. · Return leaves 3:55 a.m. · 6 h 55 min of travel, both ways together
out nonstop, back nonstop
found 2 days ago
Found recently, and the cheapest we hold
$469 23 Apr 2027 – 10 May 2027found 2 days agoSee prices for these dates
$439 12 Mar 2027 – 24 Mar 2027found 7 days agoSee prices for these dates
What have prices looked like?
Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $361 to $442.
At $469, the cheapest return found recently is above that range.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 7 departure dates from 10 Dec to 24 Apr 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 17-night return fares leaving within 3 days of 23 Apr 2027 to compare.
Every date we hold
127 fares on 7 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 10 Dec – 24 Dec | $463 | THAI Airways | Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM) | out nonstop, back nonstop | found 5 days ago | See prices for these dates |
| 12 Jan 2027 – 13 Jan 2027 | $467 | Air India | Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM) | out 1 stop, back nonstop | found 6 days ago | See prices for these dates |
| 12 Mar 2027 – 24 Mar 2027 | $439 | China Southern Airlines | Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM) | out 1 stop, back 1 stop | found 7 days ago | See prices for these dates |
| 1 Apr 2027 – 12 Apr 2027 | $477 | Air India | Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 22 Apr 2027 – 8 May 2027 | $481 | Air India | Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 23 Apr 2027 – 10 May 2027 | $469 | THAI Airways | Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM) | out nonstop, back 1 stop | found 2 days ago | See prices for these dates |
| 24 Apr 2027 – 16 May 2027 | $470 | SriLankan Airlines | Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
Which month looks cheapest?
March 2027 is the cheapest month — from $439.
Airlines on the cheapest dates: Air India, THAI Airways, China Southern Airlines, SriLankan Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$241
25 Sept 2027 · China Southern Airlines
Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM)
Leaves 7:55 p.m. · 27 h 50 min trip
1 stop
found 3 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$241 25 Sept 2027found 3 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 12 days, 28 Sept to 10 Nov, the cheapest one-way we saw each day was $161 to $241.
At $241, the cheapest one-way found recently is at the high end of that range.
12 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 25 Sept 2027 to compare.
Every date we hold
2 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 25 Sept 2027 | $241 | China Southern Airlines | Suvarnabhumi Airport (BKK) → Tribhuvan International Airport (KTM) | 1 stop | found 3 days ago | Open this trip |
Airlines on the cheapest dates: China Southern Airlines.
Premium cabin fares from Bangkok to Kathmandu
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 23 Apr 2027 – 10 May 2027 in another cabin: Premium economy · Business · First
Today's prices for 25 Sept 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Bangkok to Kathmandu?
Return
Fares 180 or more days before departure were typically 20% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $523 | $477 | +25% | 24 |
| 7–13 days | $580 | $458 | +39% | 25 |
| 14–29 days | $519 | $438 | +24% | 45 |
| 30–59 days | $440 | $420 | +5% | 42 |
| 60–89 days | $442 | $420 | +6% | 12 |
| 90–179 days | $436 | $420 | +4% | 44 |
| 180+ days | $418 | $361 | Cheapest seen | 31 |
One-way
Not enough history yet: in 12 days of one-way prices, 28 Sept to 10 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Live price for these dates
The cheapest return found recently is for 23 Apr 2027 – 10 May 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Bangkok to Kathmandu?
The cheapest return found recently is $469 with THAI Airways, 23 Apr 2027 to 10 May 2027, found 2 days ago. The cheapest return we hold, of any age, is $439 with China Southern Airlines, 12 Mar 2027 to 24 Mar 2027, found 7 days ago. The cheapest return fare on each of 7 departure dates is usually $465 to $474.
How much is a one-way flight from Bangkok to Kathmandu?
The cheapest one-way found recently is $241 with China Southern Airlines, 25 Sept 2027, found 3 days ago.
What is the cheapest month to fly from Bangkok to Kathmandu?
March 2027 is the cheapest month for a return, from $439, 12 Mar 2027 to 24 Mar 2027, found 7 days ago.
How far ahead should I book a flight from Bangkok to Kathmandu?
In 49 days of prices between 24 Sept and 11 Nov, return fares 180 or more days before departure were typically 20% lower than 0 to 6 days before departure.
Is there a direct flight from Bangkok to Kathmandu?
Yes, the cheapest nonstop return found recently is $544 with THAI Airways, 23 Apr 2027 to 10 May 2027, found 2 days ago.
How long is the flight from Bangkok to Kathmandu?
The cheapest one-way found recently, with China Southern Airlines on 25 Sept 2027, takes 27 h 50 min with 1 stop.
Which airlines have the cheapest flights from Bangkok to Kathmandu?
Between 10 Dec and 24 Apr 2027, Air India has the cheapest return on 3 of the 7 departure dates we hold, THAI Airways on 2 and China Southern Airlines on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work