There are three main ways to fly from London to Bangkok. They have meaningfully different flight paths, trip times, and airline options. Since 2022, the route you pick matters more — and most booking sites don't show you the difference.
Turkish Airlines flies south of Ukraine and east through Turkish airspace, stopping in Istanbul on the way to Bangkok. Both parts of the flight — London to Istanbul, and Istanbul to Bangkok — generally stay away from the Middle East warning area. This is the best-scored option for most London departures right now.
Total journey time is typically 15 to 16 hours, including the connection at Istanbul (London to Istanbul is around 4 hours; Istanbul to Bangkok is around 9.5 to 10 hours). Turkish Airlines flies multiple times a day from London to Istanbul, and frequently from Istanbul to Bangkok, giving you reasonable options to switch flights if needed. Istanbul airport is large and has stayed operationally reliable.
Emirates flies south from London through the Middle East, stopping in Dubai. The London-to-Dubai leg goes through the active flight warning area — this is the main trade-off with this route. Emirates flies four or more times a day from London to Dubai, and has multiple Dubai-to-Bangkok connections, making it the highest-frequency option on this trip.
Total journey time is typically 16 to 17 hours, including the connection at Dubai (London to Dubai is around 7 hours; Dubai to Bangkok is around 6.5 hours). The Dubai route scores lower than Istanbul mainly because of the warning area on the first leg — not because of airport quality or airline reliability. Dubai airport has stayed reliable throughout the current warning period.
Cathay Pacific flies east through Central Asian airspace and stops in Hong Kong, completely avoiding the Middle East warning area. This is the cleanest airspace option on this trip — neither part of the flight goes through the active warning area.
The trade-off is time: total journey time is typically 16 to 17 hours, including the connection at Hong Kong (London to Hong Kong is around 12 hours; Hong Kong to Bangkok is around 2.5 hours). This route makes the most sense when avoiding the warning area completely is your top priority.
Journey times shown are total door-to-door, including a typical airport connection. Pure flight time for all three options is roughly similar at 13 to 14 hours of air time — the difference in total duration comes mainly from connection length and scheduling.
FlightDetour scores all three routes on five things: whether they go through a warning area, how many backup routes exist, how good the stopover airport is, how long the extra detour is, and how many airlines fly it. The Istanbul route scores highest here — it avoids the warning area and is more direct than going via East Asia. The Hong Kong route scores well for airspace but adds the most time. Dubai scores lower for airspace but higher for daily flight count.
The right choice depends on what matters most to you. The comparison page shows all three scored side by side with a plain-English recommendation and an explanation of why one ranks above the others right now.
The results page compares all three routes with current scores and a plain-English recommendation.
Same route logic applies to