Flights Bangkok to Hanoi (DMK-HAN): Airlines, THB Fares

Bangkok Don Mueang to Hanoi is a short regional hop linking the Bangkok low-cost gateway with the Vietnamese capital, with around 21 flights a week. It carries Thai travellers heading to Hanoi for short breaks, Vietnamese visitors bound for Bangkok, and a steady flow of regional tourists. Block time is under two hours.

Corridor profile

The DMK–HAN corridor runs about 21 departures a week across 2 carriers, with an average block time of 1.8 hours, and the lowest fare the feed returned for this route is ฿4,530. The frequency figure counts every carrier on the route combined, not any single airline.

What frequency tells you when plans break. 21 weekly departures is ~3.0 departures a day — the next departure is usually same-day or next-day. That is why frequency matters more than price for anyone with a fixed commitment at the other end. A thin corridor deserves a buffer day before anything that cannot move, not because the airline is poor but because there is no spare inventory to shift you onto.

Combined frequency is not your airline’s frequency. Those 21 weekly departures are spread across 2 carriers, and when your flight is cancelled only the airline holding your ticket owes you a seat. A rival’s empty seat on the same city pair does not help unless an interline agreement exists or you are willing to buy a second ticket. That is why a multi-carrier route is not automatically the safer one it appears to be.

Airlines & baggage

Baseline baggage on DMK–HAN runs 7 kg across the 1 of 2 carriers on the route for which we hold a row. These are carrier reference baselines, not entitlements attached to every ticket: cabin class, fare brand and frequent-flyer status all change the weight you actually get.

An infant fare is not a free seat. We record Thai AirAsia’s infant fare at about 15% of the adult fare. That rate is for a lap infant with no seat of its own. Want a separate seat or a car seat and it becomes a child fare, priced as a share of the full fare, and the infant’s own baggage entitlement is usually far smaller than an adult’s. Strollers normally travel outside the weight allowance, but the policy differs by carrier — confirm before you fly.

A dash means we do not hold the data. VietJet Air appear on this corridor in our catalogue but have no alliance or baggage row in our database, so we print a dash rather than guess. Check those carriers’ own pages before buying. Leaving the cell empty is more honest than filling it with a plausible number that has no source.

Airlines on this route

2 carriers operate DMK–HAN — predominantly unbundled. No major-alliance carrier appears on this route. Multiple carriers only affect price when both sides are actually selling in the same window. We hold 9 monthly lows spanning a 85% range. This corridor scores 7/10 on our own catalogue demand ranking.

Two low-cost carriers fly DMK-HAN: Thai AirAsia and VietJet Air (VJ). Both operate the route on a budget model — a slim base fare with baggage, seat selection and food added separately. The route is built for quick regional travel, and light packers get the lowest price by carrying cabin baggage only.

Compare totals, not headline numbers. Thai AirAsia price the seat low and sell bag, seat and meal separately; the full-service carriers fold them into the fare. Comparing the first number you see compares two different products. Add one bag and one seat assignment on both sides, then read the final figure. On medium-haul and longer, the remaining gap is frequently smaller than the search page suggests.

Fare trends

We hold only 2 weekly captures for this corridor — too few to call a trend. Read what follows as an explanation of the mechanics rather than a forecast. We capture the lowest observed fare once a week and accumulate the series over time.

As a short route flown by two low-cost carriers, DMK-HAN is among the cheaper international links from Bangkok. Demand rises around the Vietnamese and Thai New Year periods and school holidays. For ordinary dates, two to four weeks of lead time is usually enough for a low fare in THB, and mid-week departures are typically the cheapest.

The price is attached to a date. Our most recent low is tied to a 2026-10-13 departure. Fares on international corridors move with the day of week and the holiday calendar more than most travellers expect, and shifting the date by one or two days usually does more for the price than switching airline. If your dates are fixed, read this number as a theoretical floor rather than something you will be offered.

Seasonality & best time to book

Our catalogue lists 2 carriers on this city pair. DMK–HAN is a regional corridor with a shorter booking window than long-haul. The fare tracks low-cost promotional cycles and Thai long weekends more than any season at the destination, and Songkran plus the consecutive-holiday blocks are the tightest weeks of the year.

Bangkok–Hanoi fares move with demand. The cheapest windows fall outside school holidays, Songkran and New Year; book 4–8 weeks ahead for normal dates.

Frequency is seasonal too, not just price. The 21 weekly departures in our catalogue is an estimate of the standard schedule; carriers add and cut rotations by season. That means the cheapest month can also be the month with the fewest options — and with fewer rotations, one cancellation hurts more. Read price and frequency together.

What our data actually shows. Of the 9 months we captured, the cheapest reading was Aug 2026 at ฿2,520 and the dearest Apr 2027 at ฿4,654. These are observations, not a forecast for next year: a month that read cheap in one pass may not in the next. Use it as a starting point for comparison, not a fixed calendar.

About Hanoi

Hanoi (HAN) sits in Vietnam. The flight from Bangkok runs about 1.8 hours. The lowest fare the feed returned for this route is ฿4,530 on a 2026-10-13 departure. The trend figures rest on 2 weekly captures since week 2026-W20.

Hanoi is Vietnam’s capital — an old city built around lakes and tree-lined boulevards, with a dense Old Quarter of trading streets, French-colonial architecture and a celebrated street-food culture. It is also the usual gateway to Halong Bay and the mountains of the north. For Thai travellers it is a close, affordable and characterful short-break destination.

Local time at the destination. Hanoi runs on Asia/Ho_Chi_Minh, the same as Bangkok. The gap holds all year; the zone does not shift its clocks. The offset matters most on overnight flights, because the times on a ticket are local at each end rather than an elapsed duration. Misreading the arrival time is a common way to book a transfer or a hotel night on the wrong date.

Passenger rights on DMK–HAN

Our catalogue lists 2 carriers on this city pair. Departures from Thailand fall under Thailand CAAT; the return from Hanoi falls under Vietnam CAAV. The two regimes are not the same, and what you are owed changes with the direction of travel and the nationality of the operating carrier — never with the fare you paid.

No European-style compensation schedule applies here. The destination sits with Vietnam CAAV, which typically imposes duty of care, re-routing and refund obligations but no fixed EU261-style cash bands. The enforceable floor is therefore the airline’s own conditions of carriage plus Thailand CAAT rules for departures from Thailand. Read the conditions of carriage before you buy — that is the document that actually binds you.

Baggage loss and delay run on a separate rulebook. An airline’s liability for baggage that is lost, damaged or delayed on an international journey sits under the Montreal Convention 1999 where both the origin and destination states are parties. The caps are denominated in SDR and revised periodically, so only the current figure is usable. This frame is entirely separate from delay compensation: you can have no compensation claim and still have a baggage claim.

FAQ

Which airlines fly Bangkok to Hanoi?

The DMK-HAN route is operated by Thai AirAsia and VietJet Air. Compare baggage, alliances and fares in the table above.

How long and how often is the DMK-HAN flight?

Block time is ~1.8h, with ~21 flights per week across all carriers.

When is DMK-HAN cheapest to book?

Book 4–8 weeks ahead; avoid Songkran, school holidays and peak season to save 15–30%.

What exactly is the lowest fare shown on this page?

It is the cheapest fare our cache has recorded on DMK–HAN, captured one snapshot at a time. It is not an average, not a live quote and not a guarantee that a seat still exists at that price. Use it as a reference floor, then check live pricing.

What is the difference between a direct and a nonstop flight?

Direct means the flight number does not change, but the aircraft may still land en route. Nonstop means no intermediate landing at all. If the clock matters, filter on nonstop, not direct.

If my DMK–HAN flight is cancelled, who is responsible?

The destination sits with Vietnam CAAV, which generally imposes duty of care, re-routing and refunds but no fixed EU261-style cash bands. The enforceable floor is the airline’s conditions of carriage plus Thailand CAAT rules for departures from Thailand.

Will my bag be through-checked if I book two separate tickets?

No. Through-checking happens only when every sector is on one ticket or an interline agreement exists. On separate tickets you reclaim the bag, clear the transit country’s immigration and check in again — and a missed connection is a new ticket at your cost.

Search live fares

Search DMK → HAN on Aviasales →

Related

• DMK airport
• HAN airport