Paris (CDG) → London (LHR): cheap fares overview
Paris to London is one of Europe's most competitive air corridors, which sounds like it should mean cheap fares — and sometimes it does. AF and BA dominate the direct service, and because this route runs on business demand more than tourist curiosity, prices follow the work calendar pretty closely. Monday mornings and Friday evenings get expensive fast. Midweek departures are where the value hides. School holiday windows in both France and the UK push leisure fares up simultaneously, so half-term weeks and the grandes vacances are worth avoiding if your dates are flexible.
Why travel from Paris to London?
The Eurostar exists, sure, but flying makes sense more often than people admit — especially if you're coming from outside central Paris or heading somewhere beyond central London. French travelers make this trip for reasons that go well beyond tourism. London has one of the largest French communities outside France, so family visits drive a steady chunk of bookings year-round. Then there's the cultural pull — West End theatre, the kind of contemporary art scene that feels genuinely different from Paris, record shops, football. Food is a real draw too, which surprises some French visitors until they actually eat in London in 2025. And LHR connects onward to 224 non-stop destinations, so plenty of people are using this short hop as a positioning flight to catch long-haul routes that don't exist from CDG.
How to find a cheap fare on this route
January through early March is consistently the softest pricing window on this route — post-holiday, pre-spring, and business travel dips just enough to pull fares down. Book three to six weeks out for the best balance of availability and price; too far in advance and you're paying peak inventory rates, too late and flexibility disappears. If CDG feels expensive on a given date, check Orly — some carriers reposition pricing there. On the London side, Gatwick sometimes undercuts Heathrow meaningfully, and the train into central London is faster anyway. Avoid Friday afternoon departures like a bad layover.
Frequently asked questions
What is the cheapest month to fly from Paris to London?
Flight prices vary seasonally, with shoulder seasons (April-May and September-October) typically offering better rates than peak summer and winter holidays. Weekday flights are generally cheaper than weekend departures.
How far in advance should I book a Paris to London flight?
Booking 2-4 weeks in advance typically offers competitive prices for this route. However, it's worth setting up price alerts to catch deals, as short-haul European flights can have variable pricing depending on demand.
Is a direct flight worth it compared to connecting flights?
Direct flights are highly recommended for this 25-minute trip, as connecting flights would add hours of travel time and often cost more when factoring in total trip duration. The short flight time makes direct service the practical choice.
What currency and payment options should I use when booking Paris to London flights?
Most airlines (Air France, British Airways) accept both EUR and GBP, with prices displayed in your preferred currency during booking. Using a credit card without foreign transaction fees is recommended, as exchange rates vary between payment methods.
What should I know before booking a cheap Paris to London flight?
Budget airlines may have strict baggage policies, so verify your allowance before purchasing; on top of that, check if your ticket is refundable or changeable, as cheaper fares often come with restrictions. Arrive at the airport early as this is a popular route with frequent departures.