Paris CDG Wi-Fi, SIM Cards & eSIM: Land Online (2026)

Paris Charles de Gaulle will not leave you offline: free unlimited Wi-Fi ("WIFI-AIRPORT") covers the terminals, Relay shops sell tourist SIMs, and French 4G/5G is strong across the airport - but each option has a catch. The Wi-Fi fades before the RER B platform, the SIM counters charge an airport premium and photocopy your passport, and roaming bills whatever your home carrier decides. The smarter move is a France eSIM from €3.07 installed at home, so your phone latches onto a French network while the plane is still rolling to the gate. Here is what awaits at CDG, checked against Paris Aéroport's own Wi-Fi page.

Is the Wi-Fi at Charles de Gaulle actually free?

Yes. Paris Aéroport provides free, unlimited Wi-Fi across all CDG terminals - connect to "WIFI-AIRPORT", accept the terms on the captive portal and you are online, with no stated time limit. That puts CDG ahead of airports that still ration free sessions.

The usual honest caveats apply:

• It stops at the airport. The signal covers the terminals, not the RER B train once it pulls away and not the taxi rank.
• It is a shared public network. Fine for messages and boarding passes; think twice before doing banking on it.
• Peak-hour sag is real. When three widebodies land within twenty minutes at 2E, everyone hits the same access points.

Where free terminal Wi-Fi genuinely shines: downloading and installing your eSIM in arrivals if you forgot to do it at home. More on that below.

Can you buy a SIM card at CDG arrivals?

You can, with effort. Relay shops (the newsagent chain in every terminal) stock tourist SIMs from Orange and Bouygues Telecom, and vending machines appear in some shopping zones. But CDG is one of the weaker major airports for arrivals SIM shopping:

• Airport premium. The same tourist bundles cost noticeably more at CDG than online or at a phone shop in Paris - convenience is the product.
• Paperwork. French law requires ID for prepaid SIM registration, so expect to hand over your passport for copying.
• Patchy availability. Most SIM retail sits in departures rather than the arrivals corridor where you actually want it, stock varies, and payment is often card-only.

If you want a French number for a months-long stay, a local SIM is legitimate - buy it at an Orange or Free boutique in the city and keep the difference.

What is the smarter play for landing online at CDG?

Install a France eSIM before you fly. Two minutes on your home Wi-Fi: buy, scan the QR code, leave the line switched off until landing. When the wheels touch at CDG, flip it on and your phone registers on a French network while the rest of the cabin is still hunting for the Wi-Fi portal.

• A price you chose in advance - no airport markup, no roaming shock.
• Your home SIM stays in for calls, texts and banking codes via dual SIM.
• Top up from the dashboard if Paris eats more data than planned.

Not sure your handset supports eSIM or French bands? Our will my phone work in France guide covers compatibility in two minutes. If Paris is one stop on a wider itinerary, a Europe eSIM covers the whole trip on one plan.

What actually needs data the moment you land at CDG?

More than at most airports, because Paris transit is app-first:

• The RER B into Paris is the workhorse route - roughly 30 to 35 minutes to Gare du Nord, then Châtelet-Les Halles and Saint-Michel. Trains leave from two stations: Aéroport CDG 1 (Terminals 1 and 3, via Roissypole) and Aéroport CDG 2 TGV (under Terminal 2). The airport ticket runs around 13 EUR, and here is the catch: unlike London, Paris gates do not take a bank-card tap. You buy in the Île-de-France Mobilités app or load a Navigo Easy card - and the app purchase wants a data connection, exactly where terminal Wi-Fi has faded.
• CDGVAL between terminals is the free automated shuttle linking Terminal 1, the car parks, Roissypole/Terminal 3 and Terminal 2, every few minutes from early morning until around 1 a.m. No ticket needed - but knowing whether your connection requires it, and which RER station you want, is a maps-and-data question.
• Rideshare: Uber and Bolt pickups use designated points that differ by terminal - the app coordination happens right where the Wi-Fi gives out. Official taxis run a flat fare to Paris, roughly 56 to 65 EUR depending on the bank of the Seine.
• Arrival admin: messaging your hotel, pulling up the booking, the "just landed" to family, and checking whether today's RER B has engineering works (it happens more than Parisians would like).

What if CDG is just your layover?

Transit passengers get the same free "WIFI-AIRPORT" network, which covers a short connection fine. Two CDG-specific notes: connections can mean a CDGVAL ride plus long walks, so leave time and use the Wi-Fi while you have it; and with six hours or more, the RER B puts you at Notre-Dame in about 35 minutes. Leaving the terminal means leaving the Wi-Fi, so a France eSIM is what turns a long CDG layover into a usable Paris afternoon with maps, tickets and train times in your pocket.

How do you set it up before the flight lands?

1. Buy the €3.07 France plan at home and scan the QR code on your home Wi-Fi.
2. Leave the eSIM line switched off for the flight.
3. After landing, turn it on and set it as your data line; switch data roaming OFF on your home SIM.
4. You are online during taxi-in - RER ticket bought in the IDFM app before passport control.
5. Forgot to install? Use "WIFI-AIRPORT" in arrivals to download and activate the eSIM - still faster than the Relay queue.

The bottom line

CDG treats arrivals better than its reputation suggests: the Wi-Fi is free and unlimited, and SIMs exist if you hunt. But the Wi-Fi ends before the RER B platform, and the SIM counters charge a premium for jet-lagged convenience plus a passport photocopy. A France eSIM from €3.07 installed before departure costs less than the arrivals hall, keeps your home number live for bank codes, and has you online from touchdown through the ride into Paris.

Is CDG airport Wi-Fi unlimited?

Yes - Paris Aéroport advertises "WIFI-AIRPORT" as free with unlimited access across all CDG terminals, via a simple captive portal. Policies can change, so check the airport's current page if it matters - but as of 2026 there is no time ration to game.

How much does a SIM card cost at CDG airport?

Relay shops and vending machines sell Orange and Bouygues tourist bundles at a premium over what the same operators charge in a Paris boutique, and French law means showing your passport. A France eSIM from €3.07 bought before you fly skips the markup, the queue and the paperwork.

Is there mobile signal on the RER B from CDG into Paris?

Mostly, yes - the RER B runs above ground for most of the airport-to-Paris stretch with decent French 4G, though expect drops in the tunnelled central section around Gare du Nord and Châtelet. Buy your ticket in the IDFM app while you still have signal at the airport, and your fare is sorted regardless.

Can I just use my phone's roaming at CDG instead of an eSIM?

You can - French networks pick you up at the gate. Arriving from another EU or EEA country, roam-like-at-home rules likely make your home plan cheapest. From anywhere else, check your carrier's France rates first: daily roaming passes routinely cost more per day than a fixed-price France eSIM costs for a week.

Do I need a ticket or data for the CDGVAL shuttle between terminals?

Neither - CDGVAL is free, ungated, and runs automatically every few minutes between Terminal 1, the car parks, Roissypole/Terminal 3 and Terminal 2. What you do want data for is everything around it: which terminal your connection leaves from, which RER station to exit at, and live departure boards.