Washington Dulles International ⇄ Lisbon IAD–LIS
Airlines flew 1,681 flights between Washington Dulles International IAD in Washington, DC and Lisbon, Portugal LIS in Lisbon, PT in the twelve months to July 2026, both directions together: 290,774 passengers in 330,545 seats, 88% of them filled, and 3,643,633 pounds of freight. 3,591 miles, about 144 minutes in the air, on 3 airlines: TAP-TAP Air Portugal (1,056), United Air Lines Inc. (624), Global Jet Austria, GmbH (1).
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 69 |
| 2/25 | 59 |
| 3/25 | 120 |
| 4/25 | 141 |
| 5/25 | 164 |
| 6/25 | 178 |
| 7/25 | 182 |
| 8/25 | 182 |
| 9/25 | 175 |
| 10/25 | 171 |
| 11/25 | 114 |
| 12/25 | 118 |
| 1/26 | 67 |
| 2/26 | 60 |
| 3/26 | 122 |
| 4/26 | 146 |
| 5/26 | 166 |
| 6/26 | 176 |
| 7/26 | 184 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 9,964 |
| 2/25 | 8,049 |
| 3/25 | 20,263 |
| 4/25 | 23,939 |
| 5/25 | 28,077 |
| 6/25 | 29,891 |
| 7/25 | 30,740 |
| 8/25 | 30,863 |
| 9/25 | 29,970 |
| 10/25 | 28,923 |
| 11/25 | 20,282 |
| 12/25 | 19,663 |
| 1/26 | 10,448 |
| 2/26 | 9,230 |
| 3/26 | 21,475 |
| 4/26 | 27,116 |
| 5/26 | 29,699 |
| 6/26 | 31,122 |
| 7/26 | 31,983 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| TAP-TAP Air Portugal TP | 1,056 | 158,081 | 90% | scheduled passenger service |
| United Air Lines Inc. UA | 624 | 132,680 | 86% | scheduled passenger service |
| Global Jet Austria, GmbH IGA | 1 | 13 | 93% | charter passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Airbus A330-900neo | 1,054 | 167 | 157,724 |
| Boeing 767-400/ER | 342 | 230 | 69,029 |
| Boeing 777-200ER/200LR/233LR | 249 | 276 | 57,517 |
| Boeing 767-300/300ER | 33 | 203 | 6,134 |
| Airbus Industrie A330-200 | 2 | 266 | 357 |
| Bombardier BD-700 Global Express | 1 | 14 | 13 |
IAD → LIS this direction alone · flown January 2025 to July 2026
842 flights of 320 scheduled, 145,692 passengers in 165,689 seats, 141,846 pounds of freight, 45 pounds of mail. TAP-TAP Air Portugal 529; United Air Lines Inc. 313.
LIS → IAD this direction alone · flown January 2025 to July 2026
839 flights of 320 scheduled, 145,082 passengers in 164,856 seats, 3,501,787 pounds of freight, 37,417 pounds of mail. TAP-TAP Air Portugal 527; United Air Lines Inc. 311; Global Jet Austria, GmbH 1.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Washington Dulles International IAD and Lisbon, Portugal LIS; all routes.