Thailand Domestic Flights: Routes, Airlines & Tips

Domestic Flights from Bangkok: Airlines, Routes, and Booking Tips Bangkok is the hub of Thailand's domestic aviation network, with two airports serving dozens of routes to every corner of the country. Whether you are heading to Chiang Mai's temples, Phuket's beaches, or Krabi's islands, understanding which airlines fly where, from which airport, and at what price point will save you time and money. The domestic flight market is competitive, with fares that can be astonishingly cheap if you know when and how to book. ## Bangkok's Two Airports: Don Mueang vs Suvarnabhumi Bangkok operates two commercial airports, and knowing which one your flight departs from is essential. Don Mueang International Airport (DMK), Bangkok's original airport north of the city center, serves as the base for budget carriers. Suvarnabhumi Airport (BKK), the newer and larger airport east of the city, handles full-service airlines and most international flights. Getting to Don Mueang from central Bangkok takes 30 to 60 minutes by taxi depending on traffic, with fares typically running 200 to 350 THB on the meter. The A1 and A2 airport buses connect Don Mueang to the BTS system at Mo Chit and Chatuchak stations for 30 THB. There is no direct rail link to Don Mueang, though one is under construction. Suvarnabhumi is connected to the city by the Airport Rail Link, which takes approximately 30 minutes from Phaya Thai BTS station and costs 45 THB. Taxis from central Bangkok run 250 to 400 THB on the meter plus tolls. Both airports have food courts, lounges, and duty-free shopping, though Suvarnabhumi's facilities are more extensive. ## AirAsia: The Budget King AirAsia, operating from Don Mueang, is typically the cheapest option for domestic flights. The airline follows a strict low-cost model: the base fare is low, but everything else costs extra. Checked baggage, seat selection, food, and priority boarding are all add-ons. A one-way flight to Chiang Mai can start as low as 900 to 1,500 THB if booked well in advance, with promotional fares occasionally dropping below 800 THB. AirAsia's baggage policy allows a free cabin bag of 7 kilograms. Checked baggage must be pre-purchased online and costs significantly less than buying at the airport. A 20-kilogram allowance runs approximately 300 to 500 THB when booked online versus 600 to 900 THB at check-in. The airline uses a fleet of Airbus A320 aircraft with tight seating but is reliable and punctual by low-cost carrier standards. Key domestic routes from Bangkok: Chiang Mai (1 hour, 900-3,000 THB), Phuket (1.5 hours, 1,000-3,500 THB), Krabi (1.5 hours, 1,000-3,000 THB), Hat Yai (1.5 hours, 900-2,500 THB), Udon Thani (1 hour, 800-2,500 THB), and Chiang Rai (1.5 hours, 1,000-3,000 THB). ## Nok Air: Budget with Personality Nok Air, also based at Don Mueang, positions itself as a budget carrier with slightly more personality and service than AirAsia. The airline's colorful bird-themed livery and marginally more generous inclusions make it a popular choice. Nok Air includes 7 kilograms of cabin baggage and, on some fare classes, 15 kilograms of checked baggage in the base price. Fares are generally comparable to AirAsia, sometimes slightly higher but with better inclusions. Nok Air serves many of the same routes plus some smaller regional airports that AirAsia does not, including Nan, Loei, Nakhon Si Thammarat, and Roi Et. For destinations off the main tourist routes, Nok Air often has exclusive service. The airline operates a mix of Boeing 737 and De Havilland Dash 8 turboprop aircraft, the latter used on shorter routes to smaller airports. The turboprops are smaller and louder but perfectly safe and often provide more interesting approaches into regional airports. ## Thai Smile: Full Service at Mid-Range Prices Thai Smile Airways, a subsidiary of Thai Airways, operates from Suvarnabhumi Airport and offers full-service domestic flights. This means your ticket includes checked baggage (typically 20 kilograms), seat selection, a snack or meal, and drinks. The experience is noticeably more comfortable than budget carriers, with wider seats and less frantic boarding processes. Fares are typically 30 to 50 percent higher than AirAsia or Nok Air for the same routes, but the inclusions often make the total cost comparable when you factor in baggage and other add-ons. A one-way flight to Chiang Mai runs approximately 1,500 to 3,500 THB. Thai Smile operates Airbus A320 aircraft and is known for good punctuality. For travelers connecting from international flights at Suvarnabhumi, Thai Smile offers seamless connections without the need to transfer between airports, which alone can save two to three hours and the stress of navigating Bangkok traffic. ## Bangkok Airways: The Boutique Airline Bangkok Airways, operating from Suvarnabhumi, positions itself as a premium boutique airline. Every ticket includes checked baggage, meals, lounge access at their own airport lounges, and seat selection. Bangkok Airways lounges at Suvarnabhumi and Chiang Mai offer complimentary food, drinks, and comfortable seating, making the wait before a flight genuinely pleasant. The airline holds exclusive routes to Koh Samui, meaning it is the only carrier flying directly to Samui Airport, which Bangkok Airways owns. This monopoly means Koh Samui flights are expensive, typically 3,000 to 8,000 THB one-way. Other routes include Chiang Mai, Phuket, Krabi, Lampang, and Sukhothai. Bangkok Airways also operates international routes to Phnom Penh, Luang Prabang, and the Maldives. For the Koh Samui route specifically, Bangkok Airways is the only practical option for a direct flight. The alternative is flying to Surat Thani on a budget carrier and taking a ferry, which adds four to five hours but saves significant money. ## Common Routes and Pricing Guide Chiang Mai is Bangkok's busiest domestic route, with multiple daily flights on all four airlines. The one-hour flight is the fastest way to reach northern Thailand and is almost always cheaper and faster than the 12-hour overnight train. Expect to pay 1,000 to 3,000 THB on budget carriers and 2,000 to 4,500 THB on full-service airlines. Phuket flights take about 1.5 hours and are slightly more expensive, averaging 1,500 to 4,000 THB on budget carriers. Prices spike dramatically during peak tourist season from December through February and during Thai holidays. Krabi is similarly priced and timed, serving as the gateway to Koh Phi Phi and Ao Nang. Koh Samui via Bangkok Airways runs 3,000 to 8,000 THB due to the route monopoly. This is one of the few domestic routes where the flight cost represents a significant portion of the total trip budget. ## Booking Tips for the Best Fares Book domestic flights 30 to 60 days in advance for the best prices. Fares for all airlines increase sharply within two weeks of departure. Use Skyscanner or Google Flights to compare across all carriers simultaneously, but always complete the booking on the airline's own website or app to ensure the best price and easiest rebooking if needed. Tuesday and Wednesday flights are consistently cheaper than weekend flights. Early morning departures, typically the 6:00 to 7:00 AM slots, are often the cheapest of the day. Red-eye flights are not common on domestic routes due to the short distances. Sign up for AirAsia's and Nok Air's mailing lists for flash sale notifications. AirAsia's Big Sale events, held several times per year, offer fares as low as 0 THB base fare plus taxes, meaning you can fly domestically for as little as 500 to 700 THB all-in during promotions. ## Baggage Policies Compared AirAsia allows 7 kilograms cabin baggage, no free checked bags. Nok Air allows 7 kilograms cabin plus up to 15 kilograms checked on some fares. Thai Smile includes 20 kilograms checked baggage on all fares. Bangkok Airways includes 20 kilograms checked baggage plus lounge access on all fares. For short weekend trips with carry-on only, AirAsia's base fare is unbeatable. For trips requiring checked luggage, calculate the total cost including baggage add-ons before assuming the budget carrier is cheapest. In many cases, Thai Smile's all-inclusive fare is competitive with a budget carrier fare plus baggage fees.