Deal Brief
IAD to LIS is currently available as a round-trip redemption for 69,100 points plus $96.10 in taxes. This option prices in Economy through united+aeroplan, with strong seat availability. This is 2% below the previously tracked price.
Route: Best Round-Trip Deal: Washington, DC to Lisbon
Route code: IAD -> LIS + LIS -> IAD
Program: United MileagePlus / Air Canada Aeroplan (Mixed)
Airline: TAP Air Portugal, United Airlines
Trip style: 4 days
Travel window: Multiple
Available dates:
September 2026 (1) cash price unavailable
- SEP-27 to OCT-1
December 2026 (1) cash price unavailable
- DEC-28 to JAN-1
Cash fares are approximate round-trip prices via Travelpayouts. Point value = (cash fare − taxes) ÷ points. united+aeroplan baseline: 1.3¢/pt.
Additional Deal Information
Data Last Refreshed
Previous Price
70,200 pts
↓ 2%
Quality Score Breakdown · 63/100
Absolute Cost
20 / 50
Seat Availability
10 / 10
Cabin Tier
0 / 10
Freshness
1 / 1
Destination Tier
0 / 8
Tax Efficiency 10% cash
16 / 18
Airline Product
0 / 7
Additional Flight Information
Outbound · IAD → LIS
Booked via United MileagePlus
Airline: TAP Air Portugal, United Airlines
Return · LIS → IAD
Booked via Air Canada Aeroplan
Mixed booking: This round trip uses two different loyalty programs for the best combined price.
The booking program is where you redeem points. Different programs may price the same flight differently.