Zaventem to San Francisco (BRU–SFO) — Airlines, Schedules & Connections

Belgian passport holders travel to the US under the Visa Waiver Program for stays up to 90 days. An approved ESTA (Electronic System for Travel Authorization) is required before boarding and costs USD $21. The ESTA is valid for 2 years or until passport expiry. An e-passport with a machine-readable chip is mandatory.

The Airport Express train runs every 15–20 minutes from Brussels Central, Midi (South), and Nord stations to BRU in 17–25 minutes (€11.80 one-way, free with Brussels Card). Traffic on the Ring road (R0) is heavily congested during morning rush, making the train the consistent choice for peak departures.

Taxis from central Brussels cost €40–55 and take 25–40 minutes. Ride-shares (Uber) run €30–45. Parking at BRU starts at €10/day in the P-Long facility with free shuttle.

BART from SFO station (free AirTrain from any terminal to the station) to downtown San Francisco takes 30–40 minutes ($10.45 to Embarcadero). Traffic on 101 can make taxis and ride-hails much slower during peak hours; BART skips all of that. BART also reaches Oakland, Berkeley, and Millbrae for Caltrain connections.Ride-hails from SFO use a dedicated garage pickup area; follow signs. Taxis are metered; downtown SF costs $40–60. Caltrain to the Peninsula (Mountain View, Palo Alto, San Jose) requires taking BART to Millbrae station for the transfer. Rental cars are at a consolidated facility accessible by AirTrain.

Coastal fog dominates the climate pattern. The thick marine layer ("Karl the Fog") rolls into SFO from the Pacific regularly in summer (June–September), causing significant low-visibility delays even on days that appear sunny inland. Morning fog burns off by afternoon most days, but persistent IFR conditions can last all day. This is the primary flight disruption risk at SFO.

Temperatures are mild year-round (10–20°C) with little seasonal variation. Winters bring rain (December–March) and occasional atmospheric river events that cause brief but intense flooding on the 101. Summers are cool. Pack a light jacket year-round. Wind off the bay affects small aircraft approach paths.