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There are some phenomenal Business Class fares available at the moment from London to Bangkok – starting at just £975 return.
The very cheapest fares I saw were with Bahrain-based Gulf Air in May (example below is 10th-17th May 2018):
Longer stopovers were available for £50-100 more. Momondo seemed to be finding the lowest prices, but it’s always worth checking others like SkyScanner and Kayak too. Availability seemed patchy for the dates I was looking at, but I didn’t get chance to investigate further.
Gulf Air operates a (fairly) decent looking 2-2-2 lie-flat Business Class product. Until the end of April 2018, you can credit the flights at 100% of flown distance to American AAdvantage. After then, I think Cathay Pacific Asia Miles is probably the best option.
If you’re looking for something a bit more 5*, the superb Garuda Business Class fares between London and Bangkok are also still available, from £1033 return:
Available dates should be between: 11th April – 12th July; 16th August – 8th December; 25th December – 31st December 2018.
Again, Momondo seemed to find the lowest fare, but do check other comparison sites too.
As regards where to credit the flights, Garuda is a member of the SkyTeam alliance and has other partners too, so you’ve got lots of choice.
I would personally go for ANA Mileage Club I think, though KLM / Air France Flying Blue or Etihad Guest might be more popular choices. All three of them offer 125% of flown Miles, so you’d be looking at earning something like 21,000 Miles.
Garuda has been known to offer extremely generous Miles redemption promotions in the past, so you may even wish to consider crediting to GarudaMiles.
Business Class deals from the UK seem to be a lot cheaper so far this year than we’ve seen in the past. When you can fly to Asia for under £1,000 from London Heathrow on good airlines, it’s hard to see the point of spending time and money repositioning to Dublin/Prague/Scandinavia, like we often suggested in the past.