Dulles (IAD) to Lisbon (LIS) flights
TAP Air Portugal, United Airlines fly nonstop from Washington Dulles International Airport to Lisbon Humberto Delgado Airport, with about 21 flights a week in July 2026. The 3,591-mile flight takes about 2h 37m gate to gate.
From
IAD
Dulles
Washington Dulles International Airport
To
LIS
Lisbon
Lisbon Humberto Delgado Airport
- Distance
- 3,591 mi · 5,779 km
- Flight time
- 2h 37m
- Airlines
- 2
- Seats filled
- 88%
Flights a week, July 2026
842 flights and 145,692 passengers in 12 months
Airlines flying IAD to LIS
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| TAP Air Portugal | 14 | Airbus A330-900neo, Airbus A330-200 | 78,169 | 0m |
| United Airlines | 7 | Boeing 767-400/ER, Boeing 777-200ER/200LR/233LR, Boeing 767-300/300ER | 67,523 | 7h 2m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 91 | 14,864 | |
| September 2025 | 88 | 15,111 | |
| October 2025 | 85 | 13,735 | |
| November 2025 | 58 | 10,068 | |
| December 2025 | 60 | 10,447 | |
| January 2026 | 33 | 4,773 | |
| February 2026 | 30 | 4,824 | |
| March 2026 | 61 | 11,440 | |
| April 2026 | 73 | 13,911 | |
| May 2026 | 83 | 14,789 | |
| June 2026 | 88 | 15,783 | |
| July 2026 | 92 | 15,947 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.