Dulles to Paris (Roissy-en-France, Val-d'Oise) (IAD–CDG) — Airlines, Schedules & Connections

US citizens enter France and the Schengen area visa-free for up to 90 days within any 180-day period. The EU's ETIAS travel authorization is expected to be required soon; register online before departure (€7, valid 3 years). Passport must be valid for at least 3 months beyond planned departure from the Schengen zone.No customs duty on personal items. EU duty-free limits apply on goods purchased outside the EU.

WMATA Silver Line Metro now reaches Dulles directly; take Silver Line to Washington Dulles Airport station (about 65 min from Metro Center, ~$7). The connection opened in late 2022.Ride-shares from downtown DC run $35–60 and take 35–50 minutes via I-66 (longer during peak hours). Washington Flyer coach to Wiehle-Reston East Metro costs $6. The airport is 27 miles from downtown; taxis are expensive ($60–80).

RER B to central Paris (Gare du Nord 25 min, Châtelet 30 min) costs €11.80. Take the free CDGVAL train from T1 or T3 to the RER station at T2 first. Heavy luggage is awkward on this line during rush hour; some platforms have no escalators.Fixed taxis: €55 to Right Bank, €65 to Left Bank. Ride-hail (Uber) costs €40–65. Le Bus Direct coaches run to Montparnasse, Opéra, and the Eiffel Tower (€17, 45–70 min). Connecting to Gare de Lyon or Massy for TGV services is possible via RER B (Denfert-Rochereau transfer).

Temperate oceanic climate. Summers are warm (20–27°C) and mostly dry with occasional thunderstorm delays. Winters are cold and overcast (2–8°C) with frequent rain and periodic frost. Snow is rare but CDG briefly closes when it falls on an unprepared system. Fog is the primary winter flight disruption, particularly November through January.

Spring is mild and wet. Autumn is the most unpredictable season weather-wise. CDG is a major hub. Even moderate weather cascades across European connections. Pack a mid-weight jacket year-round. Summers are rarely hot enough for short sleeves in the evenings.