Round-trip flights from JFK or EWR to Bangkok (BKK) typically range from $750–$1,050 depending on the season and how far in advance you book. September and October are usually among the cheapest months, while December and January tend to be the most expensive.

November fares average around $840 round-trip. It offers decent value as Thailand's dry season returns and crowds have not yet reached peak levels. Book at least 2–3 months ahead for better November fares.

December is one of Thailand's most expensive travel periods, with fares often reaching $1,000–$1,100 round-trip. Book 4–6 months ahead, consider traveling in mid-December rather than Christmas week, and compare connecting options from airlines such as Turkish Airlines and Qatar Airways.

Total travel time from the US to Bangkok is generally around 18–22 hours with one connection. From Los Angeles (LAX), routes via Seoul or Tokyo can take around 17–19 hours, while New York (JFK) routes via Doha or Dubai typically take around 20–22 hours.

Chiang Mai (CNX) generally requires a connection when traveling from the US. Most travelers fly to Bangkok (BKK) first and then take a domestic flight to Chiang Mai, which takes about 1 hour and can add roughly $40–$80 to the total fare.

From Houston (IAH), popular options include Qatar Airways via Doha and Emirates via Dubai. Other airlines may require a connection through another major US or international hub. Compare different routings on Triwize to find the best combination of price and travel time.

From San Francisco (SFO) to Bangkok, expect around 18–20 hours total with one connection. Korean Air via Seoul and EVA Air via Taipei are popular West Coast routings, offering convenient connections and competitive fares.

There are generally no nonstop flights from Boston (BOS) to Thailand. Turkish Airlines offers a one-stop routing through Istanbul, while Qatar Airways via Doha and Korean Air via Seoul are other common options depending on the itinerary.

Round-trip fares from Washington DC airports such as IAD or DCA to Bangkok typically range from $800–$1,050. Qatar Airways operates from IAD to Doha with onward connections to Bangkok and can be a competitive option.

There are generally no nonstop flights from Dallas (DFW) to Thailand. Emirates via Dubai is one convenient one-stop option, while Korean Air and Qatar Airways may require an additional connection depending on the itinerary.

From Miami (MIA), booking around 3–5 months in advance can help you find better fares. Turkish Airlines via Istanbul is often a competitive one-stop option. September and October are generally among the cheaper months to travel to Thailand.

Koh Samui (USM) has limited international service and is commonly reached through Bangkok (BKK). Compare your US-to-Bangkok flight first, then add the Bangkok-to-Samui domestic segment. The island connection can add roughly $80–$150 to the total trip cost.