Deal Brief
BOS to LIS is currently available as a round-trip redemption for 80,500 points plus $92.95 in taxes. This option prices in Economy through flyingblue+delta, with strong seat availability.
Route: Best Round-Trip Deal: Boston to Lisbon
Route code: BOS -> LIS + LIS -> BOS
Program: Flying Blue / Delta SkyMiles (Mixed)
Airline: Delta Air Lines
Trip style: 5 days
Travel window: Multiple
Available dates:
November 2026 (6) cash price unavailable
- NOV-5 to NOV-10
- NOV-6 to NOV-11
- NOV-12 to NOV-17
- NOV-24 to NOV-29
- NOV-26 to DEC-1
- NOV-27 to DEC-2
December 2026 (5) cash price unavailable
- DEC-1 to DEC-6
- DEC-2 to DEC-7
- DEC-3 to DEC-8
- DEC-4 to DEC-9
- DEC-8 to DEC-13
Cash fares are approximate round-trip prices via Travelpayouts. Point value = (cash fare − taxes) ÷ points. flyingblue+delta baseline: 1.3¢/pt.
Additional Deal Information
Data Last Refreshed
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 8% cash
17 / 18
Airline Product
0 / 7
Additional Flight Information
Outbound · BOS → LIS
Booked via Flying Blue
Airline: Delta Air Lines
Return · LIS → BOS
Booked via Delta SkyMiles
Airline: Delta Air Lines
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.