Boston (BOS) to Madrid (MAD) flights

Program	Economy	Taxes and fees
British Airways ClubOn Iberia	16,000–19,500	$75.60–195.60
Iberia ClubOn Iberia	16,000–19,500	$70.60–185.60
Qatar Airways Privilege ClubOn Iberia	18,000	$70.60–210.60
Alaska Atmos RewardsOn Iberia	22,500	$25.60–65.60
JAL Mileage BankOn Iberia	23,000	$5.60–45.60
Cathay Pacific Asia MilesOn Iberia	27,000	$109–298
Finnair PlusOn Iberia	27,500	$5.60–160.60
Qantas Frequent FlyerOn Iberia	28,200	$5.60–160.60
American AAdvantageOn Iberia	30,000	$55.60–170.60
Virgin Atlantic Flying ClubOn Delta Air Lines	35,000	$5.60–1,055.60
SAS EuroBonusOn Delta Air Lines	42,000	$56–112
United MileagePlusOn JetBlue Airways	44,000	$5.60

Business and first class prices, and 2 more programs, are in the Award Flight Pricer. Chart prices need award space on your date, so search it before you transfer points.

• 
  Delta Air LinesSkyTeam · bookable with 8 programsWho books it
• 
  Iberiaoneworld · bookable with 9 programsWho books it
• 
  JetBlue AirwaysNot in an alliance · bookable with 2 programsWho books it

• Aeromexico RewardsBooks Delta Air Lines
• Air France-KLM Flying BlueBooks Delta Air Lines
• Alaska Atmos RewardsBooks Iberia
• American AAdvantageBooks Iberia
• British Airways ClubBooks Iberia
• Cathay Pacific Asia MilesBooks Iberia
• China Eastern Eastern MilesBooks Delta Air Lines
• Delta SkyMilesBooks Delta Air Lines
• Finnair PlusBooks Iberia
• Garuda Indonesia GarudaMilesBooks Delta Air Lines
• Iberia ClubBooks Iberia
• JAL Mileage BankBooks Iberia
• JetBlue TrueBlueBooks JetBlue Airways
• Korean Air SKYPASSBooks Delta Air Lines
• Qantas Frequent FlyerBooks Iberia
• Qatar Airways Privilege ClubBooks Iberia
• SAS EuroBonusBooks Delta Air Lines
• Singapore Airlines KrisFlyerBooks JetBlue Airways
• Virgin Atlantic Flying ClubBooks Delta Air Lines

• Via Halifax (YHZ)Air Canada, American Airlines and 1 more, then WestJet
  
  
  
  
• Via Porto (OPO)TAP Portugal, then Ryanair, Iberia and 2 more
  
  
  
  
  +1
• Via Lisbon (LIS)TAP Portugal the whole way
  
  
  
  
  
  +2
• Via Ponta Delgada (Azores) (PDL)Azores Airlines, then Iberia
  
  
• Via Montreal (YUL)Air Canada the whole way
  
  
  
  
• Via New York (JFK)American Airlines and Delta Air Lines the whole way
  
  
  
  
  
  
  +1
• Via Shannon (SNN)Aer Lingus, then Ryanair
  
  
• Via New York (EWR)United Airlines the whole way
  
  
  
  
• Via Dublin (DUB)Aer Lingus the whole way
  
  
  
  
  
  
• Via Barcelona (BCN)Iberia the whole way
  
  
  
  
  
  
  +2
• Via Philadelphia (PHL)American Airlines the whole way
  
  
  
  
• Via London (LHR)British Airways the whole way
  
  
  
  +2
  
  
• Via London (LGW)JetBlue Airways, then Iberia, easyJet and 1 more
  
  
  
  
• Via Paris (CDG)Air France the whole way
  
  
  
  
  
• Via Edinburgh (EDI)Delta Air Lines and JetBlue Airways, then Iberia, easyJet and 2 more
  
  
  
  
  
  +1