Deal Brief
BOS to LIS is currently available as a round-trip redemption for 78,800 points plus $75.03 in taxes. This option prices in Economy through delta+united, with strong seat availability. This is 4% below the previously tracked price.
Route: Best Round-Trip Deal: Boston to Lisbon
Route code: BOS -> LIS + LIS -> BOS
Program: Delta SkyMiles / United MileagePlus (Mixed)
Airline: Delta Air Lines
Trip style: 9 days
Travel window: OCT-5 to OCT-14
Available dates:
October 2026 (1) cash price unavailable
- OCT-5 to OCT-14
Cash fares are approximate round-trip prices via Travelpayouts. Point value = (cash fare − taxes) ÷ points. delta+united baseline: 1.3¢/pt.
Additional Deal Information
Data Last Refreshed
Previous Price
82,400 pts
↓ 4%
Quality Score Breakdown · 64/100
Absolute Cost
20 / 50
Seat Availability
10 / 10
Cabin Tier
0 / 10
Freshness
1 / 1
Destination Tier
0 / 8
Tax Efficiency 7% cash
17 / 18
Airline Product
0 / 7
Additional Flight Information
Outbound · BOS → LIS
Booked via Delta SkyMiles
Airline: Delta Air Lines
Return · LIS → BOS
Booked via United MileagePlus
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.