Sepang to Dulles (KUL–IAD) — Airlines, Schedules & Connections

KLIA Ekspres train runs non-stop from KL Sentral to KLIA in 28 minutes (RM55 one-way). KLIA Transit (slightly slower, RM55, stops at three intermediate stations) also serves the airport. Both run from 5am to midnight, every 15–20 minutes. Road from central KL takes 45–90 minutes depending on traffic.

The airport is 50km south of central KL. Taxis and Grab from the city cost RM50–80. Budget Terminal KLIA2 (AirAsia hub) is a separate building served by the same rail link.

Silver Line Metro runs from Washington Dulles Airport station to Metro Center in about 65 minutes (~$7). The route bypasses I-66 and I-495 congestion entirely. Washington Flyer coach also runs to Wiehle-Reston East station ($6, 15 min) for Metro connection.Taxis and ride-shares to downtown DC cost $55–80 and take 35–55 minutes depending on traffic. Car rental facilities are on-site. Dulles is 27 miles west of the Capitol; it is farther than either DCA or BWI from central DC.

Humid continental climate. Summers are hot and muggy (30–36°C) with frequent afternoon thunderstorms that cause delays June through August. Winters bring cold temperatures (−3 to 5°C) with snow and ice. The Virginia suburbs accumulate more snow than downtown DC, and ice storms are the primary disruption risk.

Dulles sits at higher elevation in Virginia's piedmont and sees more winter precipitation than DCA. Spring and fall are variable. Snowfall is possible into April. Thunderstorms begin from April through May.