RER B

30–35 minutes from Antony into Paris if RER B behaves

RER B only touches Orly indirectly: you first ride Orlyval from terminals 1–4 to Antony, then hop on RER B into Paris, with the Antony–center run taking about 30–35 minutes when things are smooth. This combo feels familiar if you already know the CDG–RER B setup and don’t mind a standard suburban commuter train instead of a coach or taxi. Figure roughly 1 hour door to door from Orly terminals to central Paris if you count the Orlyval leg, platform changes, and a few minutes of waiting.

Trains on RER B run every 5–10 minutes in daytime between Antony and central hubs like Denfert-Rochereau, Châtelet–Les Halles, and Gare du Nord. Locals warn that signal problems and evening/weekend track work can quietly stretch the ride by 10–15 minutes beyond the timetable. During strikes, delays and cancellations spike, which is when that “grim but fast” Reddit description stops being accurate and you’re just stuck on a crowded platform.

How to ride RER B from Orly via Antony

• 1. From terminals 1, 2, 3, or 4, follow signs for Orlyval and ride the shuttle (about 8 minutes) to Antony station.
• 2. At Antony, buy a combined Orlyval + RER ticket to your Paris station; machines show major stops like Denfert-Rochereau, Châtelet–Les Halles, and Gare du Nord with specific zone prices.
• 3. On the platform, check the overhead screens for the next RER B; trains may be labeled B2, B4, or similar, each with its own stopping pattern.
• 4. Confirm on the onboard screens that your chosen train actually stops at your intended station in Paris, especially if you’re aiming for smaller stops beyond the main hubs.
• 5. At busy stations, follow exit and metro/RER signage carefully; walking from RER B to another line at Châtelet–Les Halles can easily take 5–10 minutes underground.

What regulars do, and what to watch out for

Daily commuters hunt for semi-fast RER B services that skip several suburban stations but still call at Denfert-Rochereau, Châtelet–Les Halles, and Gare du Nord, shaving a few minutes versus all-stop trains. Many riders aim for the middle cars because escalators and exits at Châtelet–Les Halles and Gare du Nord often align there, which can be the difference between a 3-minute and 8-minute transfer with a rollaboard. Some frequent Orly users even bail at Denfert-Rochereau and swap to metro line 4 or 6 to dodge the heaviest RER B crowds.

Complaints hit the same points: crowded cars, dirty interiors, and occasional pickpocket attempts on the airport stretch between Antony and central Paris. Ticket inspections and security checks are more common near the airport sections, so keep your validated ticket handy to avoid fines and extra delays at the doors. If you’re hauling two big checked bags, the stairs and long walks at nodes like Châtelet–Les Halles or Gare du Nord can feel like a mistake compared with a taxi meter ticking on the A6 or périphérique.

Practical tip: if you have a tight rail or metro connection beyond Paris, pad your schedule by at least 15 minutes on top of the nominal 30–35 minute Antony–Paris RER B time to absorb signal issues, ticket checks, or slow walks between platforms.