Dulles (IAD) to Lisbon (LIS)
Flight time
≈ 7h 58m
Bearing
67° NE
Dulles (IAD) to Lisbon (LIS) is 3,583 miles (5,766 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAD–LIS
Filed traffic dataIn July 2026, TAP-TAP Air Portugal operated the most departures, one of 2 carriers flying nonstop IAD–LIS; the Airbus A330-900 was the most common aircraft at 67% of departures; flights ran 87% full.
Departures
184
July 2026
Seats
36,727
both directions
Passengers
31,983
both directions
Load factor
87.1%
RPM ÷ ASM
Who flies IAD–LIS?
TAP-TAP Air Portugal operated the most nonstop IAD–LIS departures in July 2026 (124), one of 2 carriers on the route.
- TP
TAP-TAP Air Portugal
124 departures · 20,167 seats
Share of departures67.4%92.0%
Load
- UA
60 departures · 16,560 seats
Share of departures32.6%81.1%
Load
What plane flies IAD–LIS?
In July 2026, the Airbus A330-900 flew 67% of IAD–LIS departures — more than any other aircraft type.
- Airbus A330-900
124 departures · 92.0% load
67.4% - Boeing 777-200
60 departures · 81.1% load
32.6%
How has IAD–LIS traffic changed?
Nonstop IAD–LIS departures rose from 182 in August 2025 to 184 in July 2026.
Monthly nonstop IAD–LIS traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
182 departures · 30,863 passengers
91.0%
Load
September 2025
175 departures · 29,970 passengers
91.3%
Load
October 2025
171 departures · 28,923 passengers
90.3%
Load
November 2025
114 departures · 20,282 passengers
89.5%
Load
December 2025
117 departures · 19,663 passengers
84.4%
Load
January 2026
67 departures · 10,448 passengers
85.4%
Load
February 2026
60 departures · 9,230 passengers
81.9%
Load
March 2026
122 departures · 21,475 passengers
87.4%
Load
April 2026
146 departures · 27,116 passengers
87.5%
Load
May 2026
166 departures · 29,699 passengers
85.9%
Load
June 2026
176 departures · 31,122 passengers
87.8%
Load
July 2026
184 departures · 31,983 passengers
87.1%
Load
By direction
Each direction is filed separately — they rarely match.
IAD → LIS
86.9% full
92 departures · 15,947 passengers
LIS → IAD
87.3% full
92 departures · 16,036 passengers
Nonstop IAD–LIS traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
The airports
Lisbon
PT
Lisbon Humberto Delgado Airport
Coordinates
38.78°N, 9.14°W
Hemisphere
N · W
Frequently asked
How far is Dulles (IAD) from Lisbon (LIS)?
IAD to LIS is 3,583 miles (5,766 km / 3,113 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAD to LIS?
A nonstop covers the 3,583-mile great-circle distance in roughly 7h 58m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAD–LIS?
In July 2026, the Airbus A330-900 flew the largest share of departures (67.4%), followed by the Boeing 777-200 (32.6%).
What mileage do I earn flying IAD–LIS?
Distance-based programs credit off the 3,583-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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