Dulles to Sion (IAD–SIR) — Airlines, Schedules & Connections

IAD Airport Page →
4,133 mi airlines 0/wk
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Connecting Flight Schedule 1 1-stop flight Verified 1mo ago
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  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Dulles to Sion
Connecting service available through multiple hubs.
4,133 mi 7h 1m nonstop +6h ahead 1 1-stop hubs

While no nonstop service exists between IAD and SIR, connecting options are available through 1 hub.

Also explore IAD Routes SIR Routes IAD Live Flights SIR Live Flights IAD Delays
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for IAD to SIR.
1-STOP
One-Stop Connections
1
Hubs
~10h
Fastest
~10h
Longest
Verified with published schedule alignment and minimum connection time.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
+6h
Sion is 6 hours ahead of Dulles.
IAD: EDT · SIR: CEST

When it's 6:00 PM in Dulles, it's 12:00 AM (next day) in Sion.
Distance & Flight Time
4,133 mi / 6,651 km
Nonstop flight time is approximately 7h 1m.
Visa & Entry

US passport holders enter Switzerland visa-free for stays up to 90 days within any 180-day period. This falls under the Schengen area rules, so the 90-day limit is shared across all Schengen countries. No advance application is needed. Passport must be valid for at least 3 months beyond the planned departure from the Schengen area.

Verify entry requirements with official sources before travel.
Getting to IAD

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).

Facts

IAD–SIR Quick Facts

Key statistics for the Dulles to Sion route.
Route details
Distance4,133 mi / 6,651 km
Flight time7h 1m
Time difference+6 hours
Airlines (nonstop)0
1-stop connections1 hubs
Origin: IAD
Full nameWashington Dulles International Airport
IATA / ICAOIAD / KIAD
TimezoneAmerica/New_York
Passengers/yr26.0M
Elevation312 ft / 95 m
Destination: SIR
Full nameSion Airport
IATA / ICAOSIR / LSGS
TimezoneEurope/Zurich
Elevation1,582 ft / 482 m
FAQ

Frequently Asked Questions

Common questions about IAD to SIR flights.
Nonstop flights from Washington Dulles International Airport to Sion Airport take approximately 7h 1m. The route covers 4,133 miles.
Yes, 1-stop connections are available through SJU. These options provide additional schedule flexibility.
Sion is 6 hours ahead of Dulles.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Flights from IAD to SIR

Washington Dulles International Airport (IAD) and Sion Airport (SIR) are connected through multiple connecting hub airports.

IAD to SIR Flight Duration and Schedule

Nonstop flight time from IAD to SIR ranges from 7 hours 1 minutes. The route covers a distance of 4,133 miles (6,651 km).

Connecting Options and Alternatives

1 one-stop connections are available, with the fastest taking approximately 10 hours via SJU.