I'm looking to book a multi-city itinerary on Air France, specifically CDG-->KIX (Paris CDG to Kansai International) and KIX-->LHR (Kansai International to London Heathrow).
Air France operates flights for both these pairs, and it seems I would be able to book them separately without any issue (though very expensive, of course). However, I can't book them together (for any amount of money). When I search through ITA Matrix, this combination on Air France does not show up (even though both one-ways show up).
When I search on the Air France website, I get a little bit of hope, since on the first page after the search it indeed lists many flights in both directions. However when I select which flights I want, it gives me a strange error message "There are no flights available. Please modify your travel dates." (even though it just displayed available flights!).
Is there any hope of booking this combination, perhaps through a SkyTeam partner, or does Air France simply disallow this sort of flight combination?
By the way, the combination CDG-->KIX and NRT-->CDG seems to be easily bookable.