Flights Bangkok to Delhi (BKK-DEL): Airlines, THB Fares

Bangkok to Delhi links Thailand with India’s capital, with around 28 flights a week. It is a strong two-way corridor — Indian tourists and business travellers arriving in Thailand, and Thai holidaymakers and traders heading for Delhi and the wider north of India. Block time is close to four and a half hours, an easy single sector either by day or overnight.

Corridor profile

The BKK–DEL corridor runs about 28 departures a week across 3 carriers, with an average block time of 4.4 hours, and the lowest fare the feed returned for this route is ฿7,293. The frequency figure counts every carrier on the route combined, not any single airline.

Combined frequency is not your airline’s frequency. Those 28 weekly departures are spread across 3 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.

“Direct” and “nonstop” are not synonyms. The 4.4-hour figure is an average gate-to-gate block time for a nonstop, taxi time included but connections, check-in and immigration excluded. In booking systems “direct” means only that the flight number does not change — a single-number flight can still put down en route to refuel or pick up passengers. The word that guarantees no intermediate landing is nonstop. Filter on that one if the clock matters.

Airlines & baggage

Baseline baggage on BKK–DEL runs 15–30 kg across the 3 of 3 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.

Bags through-check only on one ticket. The carriers we hold rows for on this corridor are not all in the same alliance. A bag runs through to your final destination only when every sector sits on one ticket, or an interline agreement exists between the operators. Self-connect on two separate tickets to shave the total and you collect the bag, clear the transit country’s immigration, and check in again — and the time you must allow is far longer than a booking screen implies.

Airlines on this route

3 carriers operate BKK–DEL — 2 full-service and 1 low-cost. Alliances present on the route: Star Alliance. Multiple carriers only affect price when both sides are actually selling in the same window. We hold 8 monthly lows spanning a 74% range.

Three carriers fly BKK-DEL: Thai Airways and Air India run full-service cabins, while IndiGo operates the route low-cost. The full-service fares include checked baggage and meals; IndiGo’s base fare is leaner with extras priced separately. All three are direct, so travellers are really choosing between included baggage, departure time and headline price.

Compare totals, not headline numbers. IndiGo price the seat low and sell bag, seat and meal separately; Thai Airways and Air India 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

Between 2026-W20 and 2026-W31 we captured the BKK–DEL low 3 times, ranging ฿4,592 to ฿10,125 — a 120% spread. The cheapest reading fell in week 2026-W29, and from first capture to last the low moved down 28%.

BKK-DEL is competitively priced thanks to the frequency and the budget option on the route. Peaks cluster around Diwali, the Indian wedding season and the December holidays, when fares climb and seats sell early — two to three months of lead time is sensible for those dates. Otherwise, four to six weeks ahead usually secures a reasonable economy fare in THB.

The price is attached to a date. Our most recent low is tied to a 2026-08-25 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 3 carriers on this city pair. BKK–DEL 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–Delhi fares move with demand. The cheapest windows fall outside school holidays, Songkran and New Year; book 4–8 weeks ahead for normal dates.

What our data actually shows. Of the 8 months we captured, the cheapest reading was Aug 2026 at ฿3,397 and the dearest Mar 2027 at ฿5,917. 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.

The booking window matters more than the booking day. On a 4.4-hour corridor the fare tracks how many seats remain in each fare bucket, not which weekday you click buy. The folklore about a magic booking day has no support in the series we capture. What does show up is widening your travel dates by a day or two.

About Delhi

Delhi (DEL) sits in India. The flight from Bangkok runs about 4.4 hours. This corridor scores 7/10 on our own catalogue demand ranking. Our catalogue lists 3 carriers on this city pair. Combined corridor frequency is about 28 departures a week across all carriers.

Delhi is India’s capital and one of its great historic cities, layering Mughal monuments, the wide avenues of New Delhi and the dense lanes of the old city. The Red Fort, Humayun’s Tomb and the markets of Chandni Chowk anchor most visits. For Thai travellers it is both a destination and the usual gateway to Agra, Rajasthan and the Himalayan north.

What visa-free does not mean. Entering without a visa in advance is not a right to work, not a right to study, and not a guarantee of admission — the officer at the border still decides. The conditions most often forgotten are remaining passport validity, an onward ticket and proof of accommodation. All three are asked for more often than travellers expect, and their absence lets the airline refuse boarding at the departure airport.

Passenger rights on BKK–DEL

Our catalogue lists 3 carriers on this city pair. Departures from Thailand fall under Thailand CAAT; the return from Delhi falls under India DGCA (CAR Section 3). 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 India DGCA (CAR Section 3), 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 Delhi?

The BKK-DEL route is operated by Thai Airways, Air India and IndiGo. Compare baggage, alliances and fares in the table above.

How long and how often is the BKK-DEL flight?

Block time is ~4.4h, with ~28 flights per week across all carriers.

When is BKK-DEL 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 BKK–DEL, 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 BKK–DEL flight is cancelled, who is responsible?

The destination sits with India DGCA (CAR Section 3), 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.

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Related

• BKK airport
• DEL airport