Deal Brief
IAD to LIS is currently available as a round-trip redemption for 80,000 points plus $69.73 in taxes. This option prices in Economy through United MileagePlus, with strong seat availability.
Route: Best Round-Trip Deal: Washington, DC to Lisbon
Route code: IAD -> LIS + LIS -> IAD
Program: United MileagePlus
Airline: United Airlines
Trip style: 4 days
Travel window: Multiple
Available dates:
July 2026 (1) cash price unavailable
- JUL-4 to JUL-8
August 2026 (2) cash price unavailable
- AUG-24 to AUG-28
- AUG-25 to AUG-29
September 2026 (1) cash price unavailable
- SEP-14 to SEP-18
October 2026 (3) cash price unavailable
- OCT-11 to OCT-15
- OCT-22 to OCT-26
- OCT-27 to OCT-31
November 2026 (9) cash price unavailable
- NOV-9 to NOV-13
- NOV-10 to NOV-14
- NOV-12 to NOV-16
- NOV-13 to NOV-17
- NOV-14 to NOV-18
- NOV-16 to NOV-20
- NOV-23 to NOV-27
- NOV-27 to DEC-1
- NOV-28 to DEC-2
December 2026 (4) cash price unavailable
- DEC-1 to DEC-5
- DEC-4 to DEC-8
- DEC-7 to DEC-11
- DEC-10 to DEC-14
Cash fares are approximate round-trip prices via Travelpayouts. Point value = (cash fare − taxes) ÷ points. United MileagePlus baseline: 1.4¢/pt.
Additional Deal Information
Data Last Refreshed
Quality Score Breakdown · 65/100
Absolute Cost
20 / 50
Seat Availability
10 / 10
Cabin Tier
0 / 10
Freshness
1 / 1
Destination Tier
0 / 8
Tax Efficiency 6% cash
18 / 18
Airline Product
0 / 7