Cheap Flights to London

Compare fares across British Airways, Virgin Atlantic, Delta, United, American Airlines, Emirates, and 100+ carriers. Whether you're flying from New York, Los Angeles, Toronto, or Mumbai, Sira shows you every available fare in one search. AI-powered price insights analyze historical pricing data to tell you if fares are likely to rise or fall. Set a free price alert and we'll email you when prices drop. No hidden fees, no booking markup.

Frequently Asked Questions

What is the cheapest month to fly to London?

January through March typically offers the lowest fares. Avoid June through August and late December for the best deals.

How far in advance should I book flights to London?

For the best prices, book 6-8 weeks before departure.

Which airlines fly direct to London?

British Airways, Virgin Atlantic, Delta, United, American Airlines, and JetBlue all offer nonstop flights from major US cities.