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Flight Deals from San Francisco to Porto from $393

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Stops

  • Up to 1 stop
    $599
  • Up to 2 stops
    $765

Airlines

  • Air Canada
    $737
  • Air France
    $1063
  • Air Transat
    $869
  • American Airlines
    $927
  • Austrian Airlines
    $870
  • British Airways
    $928
  • Brussels Airlines
    $795
  • Delta Air Lines
    $783
  • IBERIA
    $840
  • ITA Airways
    $969
  • KLM
    $1063
  • Lufthansa
    $778
  • SAS Airlines
    $887
  • SATA Internacional
    $1216
  • SWISS
    $756
  • TAP Portugal
    $599
  • Turkish Airlines
    $990
  • United Airlines
    $741

Cabin Class

  • Economy
    $599

Departure Airports

  • San Francisco International Airport
    $599

Arrival Airports

  • Francisco de Sá Carneiro Airport
    $599

Layover Airports

  • Adolfo Suárez Madrid–Barajas Airport
    $927
  • Amsterdam Airport Schiphol
    $958
  • Barcelona International Airport
    $840
  • Brussels Airport
    $795
  • Charlotte Douglas International Airport
    $1221
  • Chicago O Hare Airport
    $832
  • Copenhagen Kastrup Airport
    $887
  • Dallas Fort Worth International Airport
    $979
  • Denver International Airport
    $923
  • Frankfurt am Main Airport
    $832
  • General Edward Lawrence Logan International Airport
    $1008
  • Geneva Cointrin International Airport
    $923
  • George Bush Intercontinental Houston Airport
    $765
  • Harry Reid International Airport
    $1090
  • Humberto Delgado Airport (Lisbon Portela Airport)
    $599
  • Istanbul Airport
    $990
  • João Paulo II Airport
    $1216
  • London Heathrow Airport
    $928
  • Los Angeles International Airport
    $959
  • Miami International Airport
    $981
  • Montreal Trudeau Airport
    $737
  • Munich Airport
    $778
  • New York John F Kennedy Airport
    $927
  • Newark Liberty Airport
    $741
  • Paris Charles de Gaulle Airport
    $783
  • Rome Fiumicino Airport
    $969
  • San Diego International Airport
    $779
  • Seattle Tacoma International Airport
    $842
  • Toronto Pearson Airport
    $795
  • Vienna International Airport
    $870
  • Zürich Airport
    $756

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Exclusively for Priceline Members
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BUNDLE & SAVE

Book a flight & hotel together for extra savings.

On average save $240 per traveler
TAP Portugal Logo
TAP Portugal

09/15/25

SFO
22h 40m
LIS

09/16/25

OPO
TAP Portugal Logo
TAP Portugal

09/23/25

OPO
20h 35m
LIS

09/24/25

SFO
$599
Air Canada Logo
Air Canada

09/16/25

SFO
33h 35m
YUL

09/18/25

OPO
Air Canada Logo
Air Canada

09/23/25

OPO
8h 50m
YUL

09/23/25

SFO
$737
United Airlines Logo
United Airlines

09/16/25

SFO
31h 20m
EWR

09/18/25

OPO
United Airlines Logo
United Airlines

09/23/25

OPO
8h 50m
YUL

09/23/25

SFO
$741
SWISS Logo
SWISS

09/21/25

SFO
33h 50m
YUL

09/23/25

OPO
SWISS Logo
SWISS

10/03/25

OPO
7h 30m
ZRH

10/03/25

SFO
$756
SWISS Logo
SWISS

09/21/25

SFO
25h 55m
IAH
EWR

09/22/25

OPO
SWISS Logo
SWISS

10/03/25

OPO
7h 30m
ZRH

10/03/25

SFO
$765
Lufthansa Logo
Lufthansa

09/21/25

SFO
26h 15m
MUC

09/22/25

OPO
Lufthansa Logo
Lufthansa

10/03/25

OPO
7h 30m
ZRH

10/03/25

SFO
$778
Lufthansa Logo
Lufthansa

09/16/25

SFO
33h 35m
YUL

09/18/25

OPO
Lufthansa Logo
Lufthansa

09/30/25

OPO
13h 25m
MUC
SAN

09/30/25

SFO
$779
Delta Air Lines Logo
Delta Air Lines

09/30/25

SFO
24h 25m
CDG

10/01/25

OPO
Delta Air Lines Logo
Delta Air Lines

10/07/25

OPO
25h 55m
CDG

10/08/25

SFO
$783
Brussels Airlines Logo
Brussels Airlines

09/21/25

SFO
31h 20m
YYZ
BRU

09/22/25

OPO
Brussels Airlines Logo
Brussels Airlines

10/03/25

OPO
7h 30m
ZRH

10/03/25

SFO
$795
Lufthansa Logo
Lufthansa

09/19/25

SFO
31h 30m
EWR

09/21/25

OPO
Lufthansa Logo
Lufthansa

10/07/25

OPO
11h 20m
FRA
ORD

10/07/25

SFO
$832
IBERIA Logo
IBERIA

09/21/25

SFO
35h 50m
BCN

09/23/25

OPO
IBERIA Logo
IBERIA

10/03/25

OPO
25h 15m
BCN

10/04/25

SFO
$840
SWISS Logo
SWISS

09/19/25

SFO
36h 25m
ZRH

09/21/25

OPO
SWISS Logo
SWISS

10/07/25

OPO
11h 45m
FRA
SEA

10/07/25

SFO
$842
Air Transat Logo
Air Transat

09/07/25

SFO
22h 20m
YYZ

09/08/25

OPO
Air Transat Logo
Air Transat

09/16/25

OPO
22h 53m
YYZ

09/17/25

SFO
$869
Austrian Airlines Logo
Austrian Airlines

09/19/25

SFO
27h 15m
FRA
VIE

09/20/25

OPO
Austrian Airlines Logo
Austrian Airlines

09/25/25

OPO
9h 30m
YUL

09/25/25

SFO
$870
SAS Airlines Logo
SAS Airlines

09/10/25

SFO
45h 25m
CPH

09/12/25

OPO
SAS Airlines Logo
SAS Airlines

10/03/25

OPO
22h 35m
CPH

10/04/25

SFO
$887
SWISS Logo
SWISS

09/21/25

SFO
39h 30m
ZRH
GVA

09/23/25

OPO
SWISS Logo
SWISS

10/03/25

OPO
14h 53m
FRA
DEN

10/03/25

SFO
$923
American Airlines Logo
American Airlines

09/21/25

SFO
25h 25m
JFK
MAD

09/22/25

OPO
American Airlines Logo
American Airlines

10/03/25

OPO
11h 39m
MAD
JFK

10/03/25

SFO
$927
British Airways Logo
British Airways

09/19/25

SFO
32h 52m
JFK
MAD

09/21/25

OPO
British Airways Logo
British Airways

09/26/25

OPO
25h 30m
MAD
LHR

09/27/25

SFO
$928
SAS Airlines Logo
SAS Airlines

09/21/25

SFO
43h 55m
CPH
AMS

09/23/25

OPO
SAS Airlines Logo
SAS Airlines

10/03/25

OPO
22h 35m
CPH

10/04/25

SFO
$958
SWISS Logo
SWISS

09/15/25

SFO
25h 35m
LAX
YUL

09/16/25

OPO
SWISS Logo
SWISS

09/23/25

OPO
7h 30m
ZRH

09/23/25

SFO
$959
ITA Airways Logo
ITA Airways

09/15/25

SFO
28h 5m
FCO
MAD

09/16/25

OPO
ITA Airways Logo
ITA Airways

09/23/25

OPO
25h 50m
MAD
FCO

09/24/25

SFO
$969
American Airlines Logo
American Airlines

09/15/25

SFO
32h 52m
JFK
MAD

09/17/25

OPO
American Airlines Logo
American Airlines

10/02/25

OPO
16h
MAD
DFW

10/03/25

SFO
$979
American Airlines Logo
American Airlines

09/19/25

SFO
25h 25m
JFK
MAD

09/20/25

OPO
American Airlines Logo
American Airlines

09/26/25

OPO
14h 36m
MAD
MIA

09/26/25

SFO
$981
Turkish Airlines Logo
Turkish Airlines

09/15/25

SFO
39h 5m
IST

09/17/25

OPO
Turkish Airlines Logo
Turkish Airlines

09/23/25

OPO
17h 45m
IST

09/24/25

SFO
$990
TAP Portugal Logo
TAP Portugal

08/31/25

SFO
28h 30m
BOS

09/01/25

OPO
TAP Portugal Logo
TAP Portugal

09/16/25

OPO
22h 35m
LIS

09/17/25

SFO
$1008
KLM Logo
KLM

09/19/25

SFO
41h 20m
CDG

09/21/25

OPO
KLM Logo
KLM

09/26/25

OPO
15h
AMS

09/27/25

SFO
$1063
Air France Logo
Air France

09/19/25

SFO
41h 20m
CDG

09/21/25

OPO
Air France Logo
Air France

09/26/25

OPO
15h
AMS

09/27/25

SFO
$1063
SWISS Logo
SWISS

09/06/25

SFO
29h 35m
LAS
ZRH

09/07/25

OPO
SWISS Logo
SWISS

09/15/25

OPO
20h 5m
GVA
ZRH

09/16/25

SFO
$1090
SATA Internacional Logo
SATA Internacional

09/19/25

SFO
39h 15m
BOS
PDL

09/21/25

OPO
SATA Internacional Logo
SATA Internacional

10/07/25

OPO
21h 5m
PDL
JFK

10/08/25

SFO
$1216
IBERIA Logo
IBERIA

09/02/25

SFO
25h 25m
CLT
MAD

09/03/25

OPO
IBERIA Logo
IBERIA

09/23/25

OPO
7h 55m
MAD

09/23/25

SFO
$1221

Top Deals on flights from San Francisco to Porto

San Francisco, US (SFO) - Porto, PT (OPO)

Air Canada Logo
Air Canada

Jul 14

SFO
25h 15m
YUL

Jul 15

OPO

as low as

$393

San Francisco, US (SFO) - Porto, PT (OPO)

Air Canada Logo
Air Canada

Jul 14

SFO
24h 55m
YYZ
YUL

Jul 15

OPO

as low as

$399

San Francisco, US (SFO) - Porto, PT (OPO)

IBERIA Logo
IBERIA

Sep 30

SFO
25h 10m
BCN

Oct 1

OPO

as low as

$401

San Francisco, US (SFO) - Porto, PT (OPO)

SAS Airlines Logo
SAS Airlines

Oct 13

SFO
39h 20m
CPH

Oct 15

OPO

as low as

$402

San Francisco, US (SFO) - Porto, PT (OPO)

SATA Internacional Logo
SATA Internacional

Sep 23

SFO
29h 40m
JFK

Sep 24

OPO

as low as

$418

San Francisco, US (SFO) - Porto, PT (OPO)

Air Canada Logo
Air Canada

Jul 9

SFO
26h 50m
YUL
FRA

Jul 10

OPO

as low as

$419

San Francisco, US (SFO) - Porto, PT (OPO)

SATA Internacional Logo
SATA Internacional

Sep 15

SFO
29h 40m
JFK
PDL

Sep 16

OPO

as low as

$434

San Francisco, US (SFO) - Porto, PT (OPO)

SWISS Logo
SWISS

Jul 9

SFO
36h 25m
ZRH

Jul 11

OPO

as low as

$436

San Francisco, US (SFO) - Porto, PT (OPO)

Lufthansa Logo
Lufthansa

Jul 8

SFO
26h 15m
MUC

Jul 9

OPO

as low as

$439

San Francisco, US (SFO) - Porto, PT (OPO)

TAP Portugal Logo
TAP Portugal

Jul 26

SFO
37h 40m
LIS

Jul 28

OPO

as low as

$451

San Francisco, US (SFO) - Porto, PT (OPO)

American Airlines Logo
American Airlines

Oct 13

SFO
27h 25m
LHR
MAD

Oct 14

OPO

as low as

$487

San Francisco, US (SFO) - Porto, PT (OPO)

IBERIA Logo
IBERIA

Oct 13

SFO
32h 53m
CLT
MAD

Oct 15

OPO

as low as

$488

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