$319+ Cheap flights from Houston to Portugal
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Aug 17 — Aug 241
Round-trip
1 adult, Economy
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Cheapest flights from Houston to PortugalExplore the most affordable flight options available from Houston to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2026.
Explore the most affordable flight options available from Houston to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2026.
This KLM deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:55 pm
IAH
- OPO
1 stop14h 10m
KLM
Fri 11/1311:15 am
OPO
- IAH
2 stops18h 43m
KLM
Deal found 7/15![KLM logo]()
$719
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:50 am
IAH
- LIS
1 stop13h 05m
United Airlines
Thu 11/195:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 7/14![United Airlines logo]()
$722
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:30 am
IAH
- LIS
1 stop18h 40m
United Airlines
Wed 11/185:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 7/14![United Airlines logo]()
$723
This United Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:55 am
IAH
- OPO
1 stop16h 35m
United Airlines
Fri 11/1312:35 pm
OPO
- IAH
1 stop16h 08m
United Airlines
Deal found 7/13![United Airlines logo]()
$726
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1712:15 pm
IAH
- LIS
2 stops15h 50m
United Airlines
Fri 11/275:00 am
LIS
- IAH
1 stop15h 00m
United Airlines
Deal found 7/16![United Airlines logo]()
$728
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:16 pm
IAH
- LIS
1 stop34h 04m
United Airlines
Tue 11/312:50 pm
LIS
- IAH
2 stops32h 45m
United Airlines
Deal found 7/16![United Airlines logo]()
$729
This Air Canada deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:10 pm
IAH
- LIS
2 stops30h 45m
Air Canada
Wed 11/185:00 am
LIS
- IAH
2 stops19h 27m
Air Canada
Deal found 7/15![Air Canada logo]()
$730
This Justfly.com deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:00 am
IAH
- LIS
2 stops14h 55m
Air Canada
Thu 11/195:00 am
LIS
- IAH
2 stops19h 27m
Air Canada
Deal found 7/15![Air Canada logo]()
$738
This Delta deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:55 pm
IAH
- LIS
2 stops20h 15m
Delta
Thu 11/195:00 am
LIS
- IAH
2 stops17h 35m
Delta
Deal found 7/14![Delta logo]()
$739
This Delta deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:00 am
HOU
- LIS
2 stops20h 00m
Delta
Wed 11/185:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 7/14![Delta logo]()
$739
This Gotogate deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:00 pm
IAH
- LIS
2 stops15h 20m
Multiple Airlines
Wed 10/285:00 am
LIS
- IAH
1 stop15h 00m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$744
This KAYAK deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/175:03 pm
IAH
- LIS
2 stops24h 27m
Lufthansa
Fri 11/275:00 am
LIS
- IAH
2 stops25h 30m
Lufthansa
Deal found 7/16![Lufthansa logo]()
$746
Best flights from Houston to PortugalDiscover carefully curated flight deals from Houston to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 18, 2026.
Discover carefully curated flight deals from Houston to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 18, 2026.
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:00 am
IAH
- LIS
1 stop17h 20m
United Airlines
Fri 10/305:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 7/16![United Airlines logo]()
$753
This KLM deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:24 pm
IAH
- FNC
2 stops33h 16m
KLM
Wed 10/2810:25 am
FNC
- IAH
1 stop32h 45m
KLM
Deal found 7/16![KLM logo]()
$765
This British Airways deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:10 pm
IAH
- LIS
1 stop19h 50m
British Airways
Sat 10/313:55 pm
LIS
- IAH
1 stop28h 10m
British Airways
Deal found 7/16![British Airways logo]()
$799
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:20 pm
IAH
- LIS
2 stops20h 30m
Delta
Tue 9/295:00 am
LIS
- IAH
2 stops20h 30m
Delta
Deal found 7/17![Delta logo]()
$799
This Turkish Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:10 pm
IAH
- LIS
1 stop30h 45m
Turkish Airlines
Thu 9/245:05 pm
LIS
- IAH
1 stop25h 40m
Turkish Airlines
Deal found 7/17![Turkish Airlines logo]()
$823
This United deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/94:40 pm
IAH
- LIS
1 stop24h 05m
Multiple Airlines
Mon 10/197:25 am
LIS
- IAH
1 stop36h 10m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$867
This FlightHub deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/301:00 pm
IAH
- FNC
2 stops23h 35m
TAP AIR PORTUGAL
Thu 10/89:55 pm
FNC
- IAH
2 stops43h 00m
TAP AIR PORTUGAL
Deal found 7/14![TAP AIR PORTUGAL logo]()
$1,101
This KLM deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:28 pm
HOU
- FNC
2 stops34h 12m
KLM
Wed 10/2810:25 am
FNC
- HOU
2 stops28h 40m
KLM
Deal found 7/16![KLM logo]()
$775
This Delta deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:28 pm
HOU
- LIS
2 stops19h 17m
Delta
Thu 10/155:00 am
LIS
- HOU
2 stops24h 09m
Delta
Deal found 7/14![Delta logo]()
$803
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:00 am
IAH
- OPO
2 stops19h 10m
United Airlines
Wed 10/216:00 am
OPO
- IAH
2 stops20h 53m
United Airlines
Deal found 7/16![United Airlines logo]()
$827
This Turkish Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:10 pm
IAH
- OPO
1 stop30h 50m
Turkish Airlines
Thu 9/2411:00 am
OPO
- IAH
1 stop38h 15m
Turkish Airlines
Deal found 7/17![Turkish Airlines logo]()
$836
This KLM deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:59 pm
IAH
- FNC
2 stops34h 36m
KLM
Mon 9/2810:20 am
FNC
- IAH
1 stop33h 00m
KLM
Deal found 7/14![KLM logo]()
$795
This Delta deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:28 pm
HOU
- LIS
2 stops19h 17m
Delta
Wed 10/145:00 am
LIS
- HOU
2 stops24h 09m
Delta
Deal found 7/15![Delta logo]()
$803
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:15 am
IAH
- LIS
2 stops23h 50m
United Airlines
Mon 10/127:25 am
LIS
- IAH
1 stop36h 10m
United Airlines
Deal found 7/15![United Airlines logo]()
$838
This Turkish Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:10 pm
IAH
- OPO
1 stop30h 35m
Turkish Airlines
Mon 8/246:30 am
OPO
- IAH
1 stop18h 45m
Turkish Airlines
Deal found 7/17![Turkish Airlines logo]()
$876
This British Airways deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:14 pm
HOU
- OPO
2 stops19h 51m
British Airways
Mon 9/149:25 pm
OPO
- HOU
2 stops24h 18m
British Airways
Deal found 7/16![British Airways logo]()
$1,015
This Delta deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:28 pm
HOU
- LIS
2 stops19h 17m
Delta
Wed 10/215:00 am
LIS
- HOU
2 stops24h 09m
Delta
Deal found 7/14![Delta logo]()
$863
This United Airlines deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:20 am
IAH
- LIS
2 stops21h 45m
United Airlines
Mon 10/197:25 am
LIS
- IAH
1 stop36h 10m
United Airlines
Deal found 7/18![United Airlines logo]()
$873
This Turkish Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/182:30 pm
IAH
- LIS
1 stop37h 20m
Turkish Airlines
Sat 9/265:55 am
LIS
- IAH
1 stop19h 20m
Turkish Airlines
Deal found 7/13![Turkish Airlines logo]()
$922
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:00 am
HOU
- LIS
2 stops23h 15m
Delta
Tue 10/275:00 am
LIS
- HOU
2 stops23h 09m
Delta
Deal found 7/16![Delta logo]()
$864
This Mytrip deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:00 am
IAH
- FNC
3 stops29h 10m
Multiple Airlines
Wed 10/284:10 am
FNC
- IAH
2 stops35h 43m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$1,192
This British Airways deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/269:40 pm
IAH
- FNC
1 stop36h 35m
British Airways
Fri 1/85:15 pm
FNC
- IAH
1 stop26h 50m
British Airways
Deal found 7/16![British Airways logo]()
$1,101
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:20 am
IAH
- OPO
2 stops17h 40m
United Airlines
Tue 9/2912:15 pm
OPO
- IAH
2 stops32h 38m
United Airlines
Deal found 7/17![United Airlines logo]()
$917
This KLM deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/241:15 pm
IAH
- FNC
2 stops21h 55m
KLM
Fri 1/86:00 pm
FNC
- IAH
2 stops33h 10m
KLM
Deal found 7/15![KLM logo]()
$1,021
This Turkish Airlines deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/92:30 pm
IAH
- OPO
1 stop19h 10m
Turkish Airlines
Sat 10/2410:45 am
OPO
- IAH
1 stop39h 20m
Turkish Airlines
Deal found 7/18![Turkish Airlines logo]()
$936
This Delta deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:00 am
HOU
- LIS
2 stops20h 00m
Delta
Wed 10/75:00 am
LIS
- HOU
2 stops24h 09m
Delta
Deal found 7/13![Delta logo]()
$865
This Booking.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:35 pm
IAH
- FNC
1 stop19h 15m
Multiple Airlines
Thu 10/85:40 pm
FNC
- IAH
1 stop25h 55m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$1,217
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:35 pm
IAH
- OPO
2 stops28h 25m
United Airlines
Thu 9/2411:50 am
OPO
- IAH
2 stops33h 03m
United Airlines
Deal found 7/17![United Airlines logo]()
$917
This British Airways deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/98:14 pm
HOU
- OPO
2 stops18h 21m
British Airways
Tue 8/258:55 pm
OPO
- HOU
2 stops26h 49m
British Airways
Deal found 7/13![British Airways logo]()
$1,144
This KAYAK deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/234:10 pm
IAH
- FNC
1 stop15h 50m
Multiple Airlines
Sat 11/2811:45 am
FNC
- IAH
2 stops56h 15m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$1,223
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated July 18, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated July 18, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/99:10 pm
IAH
- LIS
1 stop30h 45m
Turkish Airlines
Tue 8/255:05 pm
LIS
- IAH
1 stop32h 10m
Turkish Airlines
Deal found 7/13![Turkish Airlines logo]()
$798
This Gotogate deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/99:10 pm
IAH
- OPO
1 stop36h 40m
Turkish Airlines
Tue 8/2510:40 am
OPO
- IAH
1 stop38h 35m
Turkish Airlines
Deal found 7/13![Turkish Airlines logo]()
$819
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/99:10 pm
IAH
- LIS
1 stop20h 05m
Multiple Airlines
Tue 8/259:35 pm
LIS
- IAH
2 stops40h 27m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$911
This Turkish Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:10 pm
IAH
- OPO
1 stop30h 35m
Turkish Airlines
Mon 8/246:30 am
OPO
- IAH
1 stop18h 45m
Turkish Airlines
Deal found 7/13![Turkish Airlines logo]()
$876
This Kiwi.com deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/102:30 pm
IAH
- LIS
1 stop19h 05m
Multiple Airlines
Sun 9/66:35 am
LIS
- IAH
2 stops32h 09m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$894
This Booking.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1110:00 am
IAH
- OPO
1 stop15h 00m
Multiple Airlines
Tue 8/184:35 pm
OPO
- IAH
1 stop27h 00m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$904
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:37 pm
IAH
- LIS
1 stop14h 38m
Multiple Airlines
Sun 8/306:00 pm
LIS
- IAH
1 stop20h 44m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$820
This Turkish Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:10 pm
IAH
- LIS
1 stop36h 25m
Turkish Airlines
Mon 8/245:55 am
LIS
- IAH
1 stop19h 20m
Turkish Airlines
Deal found 7/17![Turkish Airlines logo]()
$903
This CheapOair deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:10 pm
IAH
- LIS
1 stop30h 45m
Turkish Airlines
Mon 8/245:55 am
LIS
- IAH
1 stop19h 20m
Turkish Airlines
Deal found 7/17![Turkish Airlines logo]()
$863
This CheapOair deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:10 pm
IAH
- LIS
1 stop20h 10m
Turkish Airlines
Sat 8/295:55 am
LIS
- IAH
1 stop19h 20m
Turkish Airlines
Deal found 7/15![Turkish Airlines logo]()
$882
This FlightHub deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:10 pm
IAH
- LIS
1 stop20h 35m
Turkish Airlines
Fri 9/45:55 am
LIS
- IAH
1 stop19h 20m
Turkish Airlines
Deal found 7/13![Turkish Airlines logo]()
$806
This Gotogate deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:30 pm
IAH
- OPO
1 stop19h 20m
Turkish Airlines
Mon 9/146:30 am
OPO
- IAH
1 stop18h 45m
Turkish Airlines
Deal found 7/16![Turkish Airlines logo]()
$869
One-way flights from Houston to PortugalSearch for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated July 18, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated July 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/181:45 pm
IAH
- LIS
3 stops51h 55m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/291:45 pm
IAH
- LIS
3 stops37h 10m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/249:58 pm
IAH
- LIS
3 stops43h 07m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/304:39 pm
IAH
- LIS
2 stops43h 56m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2612:21 pm
IAH
- LIS
3 stops51h 44m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:00 am
IAH
- OPO
3 stops43h 25m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/121:29 pm
IAH
- LIS
3 stops23h 16m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:49 am
IAH
- OPO
2 stops38h 31m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$378
This Turkish Airlines deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:10 pm
IAH
- LIS
1 stop36h 25m
Turkish Airlines
Deal found 7/18![Turkish Airlines logo]()
$396
This Turkish Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:10 pm
IAH
- LIS
1 stop20h 10m
Turkish Airlines
Deal found 7/15![Turkish Airlines logo]()
$400
This American Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:32 am
HOU
- LIS
2 stops17h 33m
American Airlines
Deal found 7/17![American Airlines logo]()
$463
This KLM deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:55 pm
IAH
- OPO
1 stop17h 30m
KLM
Deal found 7/13![KLM logo]()
$463
Find flight deals from Houston to Portugal
Keep the following information in mind while searching for Houston to Portugal flight deals. Data was last updated July 18, 2026.
Round-trip from | $719 (KLM) |
|---|---|
One-way from | $319 (Kiwi.com) |
Popular in | June |
Cheapest in | April |
Average price | $1,272 |
Cheapflights Fare Finder
Customize your flight search to find flights from Houston to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 18, 2026.
Use the filters below to find and compare flights from Houston to Portugal that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 10/13
10:00 am-9:20 am
1 stop17h 20m
Lisbon Humberto Delgado
Fri 10/30
5:00 am-7:15 pm
1 stop19h 15m
$753
HoustonFunchal
IAH - FNC
IAHFNC
Houston George Bush Intcntl
Wed 10/21
6:24 pm-9:40 am
2 stops33h 16m
Funchal Madeira
Wed 10/28
10:25 am-2:10 pm
1 stop32h 45m
$765
HoustonFunchal
HOU - FNC
HOUFNC
Houston Hobby
Wed 10/21
5:28 pm-9:40 am
2 stops34h 12m
Funchal Madeira
Wed 10/28
10:25 am-10:05 am
2 stops28h 40m
$775
HoustonFunchal
IAH - FNC
IAHFNC
Houston George Bush Intcntl
Mon 9/21
4:59 pm-9:35 am
2 stops34h 36m
Funchal Madeira
Mon 9/28
10:20 am-1:20 pm
1 stop33h 00m
$795
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 10/13
9:10 pm-11:00 pm
1 stop19h 50m
Lisbon Humberto Delgado
Sat 10/31
3:55 pm-3:05 pm
1 stop28h 10m
$799
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 9/22
3:20 pm-5:50 pm
2 stops20h 30m
Lisbon Humberto Delgado
Tue 9/29
5:00 am-7:30 pm
2 stops20h 30m
$799
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 10/7
5:28 pm-6:45 pm
2 stops19h 17m
Lisbon Humberto Delgado
Thu 10/15
5:00 am-11:09 pm
2 stops24h 09m
$803
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 10/7
5:28 pm-6:45 pm
2 stops19h 17m
Lisbon Humberto Delgado
Wed 10/14
5:00 am-11:09 pm
2 stops24h 09m
$803
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Thu 9/17
9:10 pm-9:55 am
1 stop30h 45m
Lisbon Humberto Delgado
Thu 9/24
5:05 pm-12:45 pm
1 stop25h 40m
$823
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
6:00 am-7:10 am
2 stops19h 10m
Porto
Wed 10/21
6:00 am-8:53 pm
2 stops20h 53m
$827
Showing 1-10 of 51 resultsSorted by cheapest first
Best time to book a flight from Houston to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Houston with our price prediction graph.
IAH-LIS
IAH-OPO
HOU-LIS
HOU-OPO
IAH-FNC
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston to Portugal
HO1-PT0
IAH-LIS
IAH-OPO
HOU-LIS
HOU-OPO
What is the cheapest month to book a flight from Houston to Portugal?
Currently, January is the cheapest month in which you can book a flight from Houston to Portugal (average of $682). Flying from Houston to Portugal in June is currently the most expensive (average of $1,349). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How far ahead should I book a flight from Houston to Portugal?
The best time to book flights from Houston to Portugal is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Reviews of airlines servicing Portugal
Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated July 18, 2026.
Get a feel of what it's like to fly with KLM,Delta, andAir France from Houston to Portugal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.4
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Crew
8.4
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Crew
8.4
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Crew
8.4
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Crew
8.4
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Crew
8.4
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Related info for your journey
Find useful and relevant information for your journey from Houston to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Houston to Portugal
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Portugal by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Houston to Portugal by cabin class
Find flights from Houston to Portugal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Houston and Portugal flights
Browse other Houston and Portugal flight options. Last updated on July 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Houston to Portugal flights
Consider these flights traveling from Houston to Portugal.
Fly to Portugal regions
Consider these flights traveling to Portugal regions.
Top 7 airlines flying from Houston to Portugal
Discover the top 7 airlines that operate flights from Houston to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$466 | Average$870 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$922 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$830 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$846 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$581 | Average$1,091 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$726 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$870 | FlexibilityNo cancel fee | On-time67% |