Long haul flight and on the oral contraceptive pill?

so, im going on on a 9 hour + flight to india from the uk in 3 weeks and 1 days time. I'm on the oral contraceptive pill and im really worried about getting deep vein thrombosis. I dont smoke on a very regular basis, infact maybe once a month or so if somebody just offers a drag or a cigarette. It's not like i keep a pack with me or anything. But other than that i dont think there's anything that could greatly affect my chances of getting DVT. However i am still really concerned, especially as the flight is over 5 hours. i was wondering is perhaps anybody had any advice on things i could do to help, and whether anyone would advice that i should come off the pill for the trip? would that help at all? or is it too close to the date of travel for it to make any difference? Im going to talk to my doctor aswell but any advice that people might give about the situation would be great. Also if i do continue to stay on the pill for the trip, is it ok if i miss my free pill week? because it happens during the trip to india and it seems like way too much hassle to deal with at the time. Also, if i take my pill at 6pm england time, should i take it at 6pm england time in india, which will be around 11pm ish in india or 6pm india time? argh im worried and confused haha. Any advice and help would be great, so thanks