Flight spends 30–140 min in the air; city-to-city includes airport access, buffer, exit time, and the transfer to town.
Flight is roughly 5× the rail footprint on this route.
Mid-band fare booked 2–3 weeks ahead, no checked bag.
The corridor.
Book three weeks ahead on Eurostar.com.
Standard class opens at €55 when reserved early. Business Premier includes lounge access and a meal for roughly double. Walk-up fares rise quickly and can exceed the cost of a flexible flight.
Should you take the train?
The advertised flight time skips the airport. Updated May 2026.
Rail schedules on this route are around 3 hours 30–40 minutes in the current timetable data, while direct CDG–Heathrow flights are scheduled at about 1 hour 10–20 minutes of flying time across roughly 100 weekly departures on Air France and British Airways. That is the part flying wins on paper.
Door-to-door changes everything. From central Paris you still need the RER to CDG, a full security and boarding buffer, the short hop, baggage reclaim, and the Heathrow Express or Elizabeth line into London. The wrapper turns a half-hour flight into well over three hours before any delay appears.
The train is a direct Eurostar service from Gare du Nord to St Pancras International in around 2 hours 20–30 minutes. You clear French and British border control in one go at the station, sit with proper seats and power, and step out already in Zone 1. There are generous luggage allowances with no weight limits and no checked-bag fees, and you can work or eat without interruption.
Since the Channel Tunnel opened, the basic pattern has been consistent: fast direct Eurostar trains versus short-haul flights from CDG to Heathrow. With both terminals some distance from the city centre, the train setup already favours anyone starting and ending in central Paris and London.
The plane still makes sense for a same-day return with an early start from the eastern suburbs or when you have a tight connection at Heathrow to a long-haul flight. Otherwise the train is simpler, cleaner, and faster end to end.
Train vs flight.
| By train | By flight | Note | |
|---|---|---|---|
| Door-to-door time | 3h 38m | ≈3h–3h 30m Wins | Train time is station-to-station; flight wrapper adds RER, security, and Heathrow rail leg. |
| Stations vs airports | Gare du Nord to St Pancras Wins | CDG to LHR | Both stations sit in the centre; CDG and LHR sit well outside and require extra rail legs. |
| Typical one-way price | €55-€120 Wins | €90-€220 | Train undercuts flight when booked three weeks ahead; last-minute fares flip the other way. |
| CO2 per passenger | 12.3 kg Wins | 45.6 kg | Train saves roughly 33 kg, or about three-quarters of the flight's footprint. |
| Frequency | around 10–15 direct/day | 15 AF/BA flights/day Wins | Flights offer more redundancy if one is cancelled; Eurostar has fewer daily departures. |
| Number of transfers | 0 (direct) Wins | 2 (airport rail legs) | Train is single-seat; flight always adds at least two rail segments plus security. |
| Working / sleeping | Full table, power, Wi-Fi, café Wins | Tray table only, no reliable power | Two hours of productive work is realistic on the train and nearly impossible on the short flight. |
| Luggage | Two pieces of luggage plus a small item at no extra cost Wins | One cabin bag free; typical short-haul checked bag fees apply if you need a hold bag | Eurostar treats luggage as carry-on; airlines charge quickly once you exceed cabin limits. |
| Operations signal | Eurostar punctuality is generally good, with occasional disruption from engineering works Wins | CDG security queues can be variable; Heathrow arrivals processes are generally predictable | Watch Eurostar engineering weekends; flight risk is mostly at CDG check-in. |
If you're taking the train.
Book three weeks ahead on Eurostar.com.
Standard tickets start around €55 in Standard class when reserved early. Business Premier adds lounge access and a meal for roughly double the price. Walk-up fares can exceed €150 and lose most of the advantage over flying.
Gare du Nord to St Pancras, both central.
Gare du Nord sits five minutes from the Métro and RER B. St Pancras opens directly onto the Underground and Thameslink. Border control happens once at the departure station; no further checks on arrival.
Engineering works are the main variable.
Eurostar is generally reliable outside major maintenance weekends. It is wise to build a modest buffer if you have a tight connection in London. The short flight is often more exposed to airport security and boarding delays than to weather.
Delays, operators, scenery.
"Arrival delays at St Pancras are typically modest, with most trains arriving close to schedule and larger delays tending to cluster around engineering works or signalling issues."
Low. The Channel Tunnel and high-speed lines are well maintained; the main fragility is occasional weekend engineering that can lead to reduced frequencies or diversions.
None on direct Eurostar services. All Paris-London trains run through without change.
"The run through northern France is flat and fast, then the tunnel, then Kent countryside before the final dash into London. Not dramatic, but the tunnel itself remains quietly impressive."
Operated by Eurostar. Through-ticketing is straightforward on their site; compensation follows Eurostar's own rules once you are on board.