Top flight deals from leading airlines:
... and +100s more
Incredible Deals
Save up to 50% on select flights with Priceline
Bundle & Save
Save an average of $240 per person when bundling your flight and hotel together with Priceline
Best Price Guarantee
If a VIP member finds a better price elsewhere, we'll refund up to 200% of the difference
Help 24/7
We’re always here for you - reach us 24 hours a day, 7 days a week
Stops
- Up to 1 stop$648
- Up to 2 stops$665
Airlines
- Air Canada$848
- American Airlines$818
- British Airways$674
- Brussels Airlines$675
- Finnair$1243
- IBERIA$764
- Lufthansa$648
- SWISS$891
- TAP Portugal$1145
- Turkish Airlines$734
Cabin Class
- Economy$648
Departure Airports
- Denver International Airport$648
Arrival Airports
- Francisco de Sá Carneiro Airport$648
Layover Airports
- Adolfo Suárez Madrid–Barajas Airport$674
- Austin Bergstrom International Airport$967
- Brussels Airport$675
- Calgary International Airport$667
- Chicago O Hare Airport$665
- Dallas Fort Worth International Airport$764
- Frankfurt am Main Airport$648
- General Edward Lawrence Logan International Airport$1145
- Humberto Delgado Airport (Lisbon Portela Airport)$827
- Istanbul Airport$734
- London Heathrow Airport$782
- Montreal Trudeau Airport$675
- Newark Liberty Airport$648
- Washington Dulles Airport$827
- Zürich Airport$891
Best Price. GUARANTEED.
Exclusively for Priceline Members
Tired of searching? Book now!
We'll refund the difference if you find a lower price.
BUNDLE & SAVE
Book a flight & hotel together for extra savings.
On average save $240 per traveler
11/16/25
DEN
27h 30m
EWR
11/17/25
OPO
12/10/25
OPO
9h 55m
FRA
12/10/25
DEN
$648
Free cancellation within 83 hours of booking
11/16/25
DEN
19h 45m
EWR
11/17/25
OPO
12/10/25
OPO
10h 48m
FRA
ORD
12/10/25
DEN
$665
Free cancellation within 83 hours of booking
11/16/25
DEN
28h 43m
ORD
FRA
11/17/25
OPO
12/10/25
OPO
34h 35m
FRA
YYC
12/11/25
DEN
$667
Free cancellation within 83 hours of booking
11/16/25
DEN
23h 13m
ORD
MAD
11/17/25
OPO
12/10/25
OPO
13h 57m
MAD
ORD
12/10/25
DEN
$674
Free cancellation within 83 hours of booking
11/16/25
DEN
24h 50m
YUL
BRU
11/17/25
OPO
12/10/25
OPO
9h 55m
FRA
12/10/25
DEN
$675
Free cancellation within 83 hours of booking
11/16/25
DEN
38h 25m
IST
11/18/25
OPO
12/10/25
OPO
25h 15m
IST
12/11/25
DEN
$734
Free cancellation within 83 hours of booking
11/16/25
DEN
27h 12m
DFW
MAD
11/17/25
OPO
12/10/25
OPO
13h 57m
MAD
ORD
12/10/25
DEN
$764
Free cancellation within 83 hours of booking
11/16/25
DEN
22h 15m
DFW
MAD
11/17/25
OPO
12/10/25
OPO
18h 45m
MAD
LHR
12/11/25
DEN
$782
Free cancellation within 83 hours of booking
11/16/25
DEN
22h 15m
DFW
MAD
11/17/25
OPO
12/10/25
OPO
18h 45m
MAD
LHR
12/11/25
DEN
$818
Free cancellation within 83 hours of booking
11/16/25
DEN
27h 30m
EWR
11/17/25
OPO
12/10/25
OPO
10h 6m
LIS
IAD
12/10/25
DEN
$827
Free cancellation within 83 hours of booking
11/18/25
DEN
26h 25m
YUL
LIS
11/19/25
OPO
11/25/25
OPO
9h 55m
FRA
11/25/25
DEN
$848
Free cancellation within 83 hours of booking
11/16/25
DEN
25h 5m
LHR
ZRH
11/17/25
OPO
12/10/25
OPO
19h
ZRH
LHR
12/11/25
DEN
$891
Free cancellation within 83 hours of booking
11/16/25
DEN
45h 25m
AUS
FRA
11/18/25
OPO
12/10/25
OPO
10h 48m
FRA
ORD
12/10/25
DEN
$967
Free cancellation within 83 hours of booking
11/16/25
DEN
24h 14m
BOS
LIS
11/17/25
OPO
12/10/25
OPO
29h 4m
LIS
BOS
12/11/25
DEN
$1145
Free cancellation within 83 hours of booking
11/16/25
DEN
22h 15m
DFW
MAD
11/17/25
OPO
12/10/25
OPO
11h 40m
MAD
DFW
12/11/25
DEN
$1243
Free cancellation within 83 hours of booking
Top Deals on flights to Porto
, () - Porto, PT (OPO)
Jul 20
LAX
22h 40m
LIS
Jul 21
OPO
as low as
$366
, () - Porto, PT (OPO)
Aug 20
LAX
45h 35m
CPH
Aug 22
OPO
as low as
$401
, () - Porto, PT (OPO)
Sep 7
LAX
36h 10m
BCN
Sep 9
OPO
as low as
$438
, () - Porto, PT (OPO)
Sep 5
LAX
26h 40m
BOS
Sep 6
OPO
as low as
$466
, () - Porto, PT (OPO)
Oct 24
LAX
36h 10m
BCN
Oct 26
OPO
as low as
$472
, () - Porto, PT (OPO)
Oct 6
LAX
38h 5m
JFK
Oct 8
OPO
as low as
$489
, () - Porto, PT (OPO)
Oct 12
LAX
27h
BOS
LIS
Oct 13
OPO
as low as
$518
, () - Porto, PT (OPO)
Aug 14
LAX
21h 45m
YYZ
Aug 15
OPO
as low as
$519
, () - Porto, PT (OPO)
Oct 28
LAX
22h 30m
ZRH
Oct 29
OPO
as low as
$521
, () - Porto, PT (OPO)
Oct 22
LAX
24h 5m
CDG
Oct 23
OPO
as low as
$527
, () - Porto, PT (OPO)
Oct 28
LAX
23h 10m
FRA
Oct 29
OPO
as low as
$527
, () - Porto, PT (OPO)
Oct 22
LAX
24h 5m
CDG
Oct 23
OPO
as low as
$527
Flights to Porto
Return flights
Flights From Porto To United StatesTop Flight Routes Destinations
Flights To TokyoFlights To MadridFlights To BrusselsFlights To ParisFlights To MunichFlights To KrakowFlights To DenpasarFlights To JohannesburgFlights To BangkokFlights To MilanFlights To StockholmFlights To IstanbulFlights To Frankfurt Am MainFlights To ZurichFlights To BudapestFlights To LondonFlights To DublinFlights To CopenhagenFlights To ViennaFlights To BarcelonaFlights To Buenos AiresFlights To TahitiFlights To Hong KongFlights To SydneyFlights To SeattleFlights To AthensFlights To SingaporeFlights To MalagaFlights To RomeFlights To Tirana