$294+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Aug 12 — Aug 191
Round-trip
1 adult, Economy
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Find cheap flights from Houston to Portugal with Cheapflights
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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 13, 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 13, 2026.
This United Airlines deal was found by Cheapflights users on 7/10. 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 11/101:53 pm
IAH
- OPO
1 stop13h 37m
United Airlines
Fri 11/206:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 7/10![United Airlines logo]()
$707
This Delta deal was found by Cheapflights users on 7/10. 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 11/104:05 pm
IAH
- OPO
1 stop12h 30m
Delta
Thu 11/195:00 am
OPO
- IAH
1 stop14h 25m
Delta
Deal found 7/10![Delta logo]()
$708
This Delta deal was found by Cheapflights users on 7/10. 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 11/117:00 am
IAH
- OPO
1 stop20h 05m
Delta
Tue 11/1711:15 am
OPO
- IAH
1 stop32h 10m
Delta
Deal found 7/10![Delta logo]()
$709
This Delta deal was found by Cheapflights users on 7/10. 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.
Mon 11/163:05 pm
IAH
- OPO
1 stop18h 20m
Delta
Thu 11/195:00 am
OPO
- IAH
1 stop14h 25m
Delta
Deal found 7/10![Delta logo]()
$712
This Delta deal was found by Cheapflights users on 7/10. 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 11/107:00 am
IAH
- OPO
2 stops21h 35m
Delta
Tue 11/1711:15 am
OPO
- IAH
1 stop32h 10m
Delta
Deal found 7/10![Delta logo]()
$713
This United Airlines deal was found by Cheapflights users on 7/10. 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 11/146:29 pm
IAH
- OPO
1 stop33h 01m
United Airlines
Fri 11/206:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 7/10![United Airlines logo]()
$718
This Booking.com deal was found by Cheapflights users on 7/12. 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.
Mon 11/211:50 am
IAH
- LIS
1 stop16h 50m
Multiple Airlines
Tue 11/1711:20 am
LIS
- IAH
1 stop29h 33m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$719
This Air Canada deal was found by Cheapflights users on 7/10. 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 11/1011:50 am
IAH
- OPO
2 stops18h 15m
Air Canada
Fri 11/206:00 am
OPO
- IAH
2 stops34h 53m
Air Canada
Deal found 7/10![Air Canada logo]()
$721
This United Airlines deal was found by Cheapflights users on 7/8. 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 7/8![United Airlines logo]()
$722
This United Airlines deal was found by Cheapflights users on 7/10. 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 11/148:18 pm
IAH
- OPO
1 stop31h 12m
United Airlines
Thu 11/196:00 am
OPO
- IAH
2 stops24h 30m
United Airlines
Deal found 7/10![United Airlines logo]()
$722
This United Airlines deal was found by Cheapflights users on 7/10. 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 7/10![United Airlines logo]()
$723
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Mon 11/211:50 am
IAH
- LIS
1 stop16h 50m
United Airlines
Tue 11/1712:50 pm
LIS
- IAH
2 stops30h 41m
United Airlines
Deal found 7/12![United Airlines logo]()
$725
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 13, 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 13, 2026.
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Mon 11/211:50 am
IAH
- LIS
1 stop16h 50m
United Airlines
Tue 11/1712:50 pm
LIS
- IAH
2 stops30h 41m
United Airlines
Deal found 7/12![United Airlines logo]()
$725
This Delta deal was found by Cheapflights users on 7/11. 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 11/1010:05 am
HOU
- LIS
2 stops23h 05m
Delta
Wed 11/185:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 7/11![Delta logo]()
$739
This KLM deal was found by Cheapflights users on 7/10. 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.
Fri 11/131:00 pm
HOU
- OPO
2 stops14h 05m
KLM
Wed 11/185:00 am
OPO
- HOU
2 stops17h 30m
KLM
Deal found 7/10![KLM logo]()
$773
This United deal was found by Cheapflights users on 7/10. 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.
Mon 12/284:10 pm
IAH
- OPO
1 stop24h 15m
Multiple Airlines
Thu 12/316:00 am
OPO
- IAH
1 stop18h 15m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$778
This Virgin Atlantic deal was found by Cheapflights users on 7/11. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am
HOU
- LIS
2 stops20h 00m
Virgin Atlantic
Wed 10/2810:00 am
LIS
- HOU
2 stops18h 09m
Virgin Atlantic
Deal found 7/11![Virgin Atlantic logo]()
$781
This Justfly.com deal was found by Cheapflights users on 7/9. 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.
Sun 10/1811:41 am
HOU
- FNC
2 stops41h 49m
British Airways
Mon 10/2612:25 pm
FNC
- HOU
2 stops40h 24m
British Airways
Deal found 7/9![British Airways logo]()
$876
This Turkish Airlines deal was found by Cheapflights users on 7/12. 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 8/312:30 pm
IAH
- LIS
1 stop37h 25m
Turkish Airlines
Sat 9/510:55 am
LIS
- IAH
1 stop38h 20m
Turkish Airlines
Deal found 7/12![Turkish Airlines logo]()
$942
This Iberia deal was found by Cheapflights users on 7/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1012:15 pm
HOU
- OPO
2 stops17h 30m
Iberia
Wed 11/188:40 pm
OPO
- HOU
2 stops17h 55m
Iberia
Deal found 7/10![Iberia logo]()
$977
This KAYAK deal was found by Cheapflights users on 7/9. 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.
Thu 12/244:10 pm
IAH
- FNC
1 stop16h 10m
Lufthansa
Wed 12/303:10 pm
FNC
- IAH
2 stops39h 10m
Lufthansa
Deal found 7/9![Lufthansa logo]()
$1,284
This United Airlines deal was found by Cheapflights users on 7/12. 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 11/109:55 pm
IAH
- LIS
2 stops27h 00m
United Airlines
Wed 11/185:00 am
LIS
- IAH
1 stop15h 00m
United Airlines
Deal found 7/12![United Airlines logo]()
$727
This Delta deal was found by Cheapflights users on 7/12. 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.
Mon 11/22:59 pm
HOU
- LIS
2 stops18h 11m
Delta
Tue 11/175:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 7/12![Delta logo]()
$739
This KLM deal was found by Cheapflights users on 7/10. 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 9/215:46 pm
IAH
- FNC
2 stops33h 49m
KLM
Mon 9/2810:20 am
FNC
- IAH
1 stop33h 00m
KLM
Deal found 7/10![KLM logo]()
$795
This United Airlines deal was found by Cheapflights users on 7/10. 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 11/1111:55 am
IAH
- OPO
2 stops15h 35m
United Airlines
Fri 11/1312:35 pm
OPO
- IAH
1 stop16h 08m
United Airlines
Deal found 7/10![United Airlines logo]()
$730
This Delta deal was found by Cheapflights users on 7/10. 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.
Fri 11/136:00 am
HOU
- OPO
2 stops21h 05m
Delta
Tue 11/175:00 am
OPO
- HOU
2 stops22h 43m
Delta
Deal found 7/10![Delta logo]()
$773
This Gotogate deal was found by Cheapflights users on 7/8. 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.
Fri 10/239:10 pm
IAH
- FNC
2 stops35h 20m
Multiple Airlines
Mon 11/212:25 pm
FNC
- IAH
2 stops39h 32m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$865
This Justfly.com deal was found by Cheapflights users on 7/9. 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.
Mon 10/192:08 pm
HOU
- FNC
2 stops39h 12m
British Airways
Mon 10/2612:25 pm
FNC
- HOU
2 stops40h 24m
British Airways
Deal found 7/9![British Airways logo]()
$876
This KLM deal was found by Cheapflights users on 7/11. 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.
Fri 10/163:55 pm
IAH
- OPO
1 stop17h 30m
KLM
Tue 10/205:00 am
OPO
- IAH
1 stop14h 20m
KLM
Deal found 7/11![KLM logo]()
$814
This Delta deal was found by Cheapflights users on 7/12. 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 10/216:00 am
HOU
- LIS
2 stops20h 00m
Delta
Wed 10/2810:00 am
LIS
- HOU
2 stops18h 09m
Delta
Deal found 7/12![Delta logo]()
$781
This Gotogate deal was found by Cheapflights users on 7/8. 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.
Fri 10/239:10 pm
IAH
- FNC
2 stops35h 20m
Multiple Airlines
Tue 11/33:05 pm
FNC
- IAH
2 stops38h 46m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$865
This United Airlines deal was found by Cheapflights users on 7/10. 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 10/1610:00 am
IAH
- OPO
1 stop15h 10m
United Airlines
Tue 10/2011:15 am
OPO
- IAH
2 stops32h 13m
United Airlines
Deal found 7/10![United Airlines logo]()
$810
This KLM deal was found by Cheapflights users on 7/8. 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.
Fri 10/163:55 pm
IAH
- OPO
1 stop17h 30m
KLM
Wed 10/215:00 am
OPO
- IAH
1 stop14h 15m
KLM
Deal found 7/8![KLM logo]()
$814
This Justfly.com deal was found by Cheapflights users on 7/9. 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.
Sun 10/1811:41 am
HOU
- FNC
2 stops41h 49m
British Airways
Sun 10/2512:50 pm
FNC
- HOU
2 stops39h 59m
British Airways
Deal found 7/9![British Airways logo]()
$942
This Delta deal was found by Cheapflights users on 7/9. 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.
Mon 11/1610:05 am
HOU
- LIS
2 stops19h 20m
Delta
Mon 11/235:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 7/9![Delta logo]()
$789
This United Airlines deal was found by Cheapflights users on 7/11. 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 10/169:45 pm
IAH
- OPO
2 stops27h 05m
United Airlines
Wed 10/2111:20 am
OPO
- IAH
2 stops30h 21m
United Airlines
Deal found 7/11![United Airlines logo]()
$815
This British Airways deal was found by Cheapflights users on 7/9. 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.
Fri 10/235:06 pm
HOU
- FNC
2 stops39h 24m
Multiple Airlines
Tue 11/33:05 pm
FNC
- HOU
2 stops32h 47m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$898
This KLM deal was found by Cheapflights users on 7/10. 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.
Fri 11/131:00 pm
HOU
- OPO
2 stops14h 05m
KLM
Mon 11/1611:00 am
OPO
- HOU
2 stops16h 43m
KLM
Deal found 7/10![KLM logo]()
$830
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Mon 12/286:40 pm
IAH
- OPO
2 stops32h 50m
United Airlines
Thu 12/316:00 am
OPO
- IAH
2 stops32h 15m
United Airlines
Deal found 7/10![United Airlines logo]()
$816
This Delta deal was found by Cheapflights users on 7/10. 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.
Thu 11/126:00 am
HOU
- OPO
2 stops22h 35m
Delta
Mon 11/165:55 am
OPO
- HOU
2 stops21h 48m
Delta
Deal found 7/10![Delta logo]()
$830
This Iberia deal was found by Cheapflights users on 7/12. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1912:14 pm
HOU
- FNC
2 stops18h 11m
Iberia
Wed 8/261:35 pm
FNC
- HOU
2 stops40h 21m
Iberia
Deal found 7/12![Iberia logo]()
$1,398
This United Airlines deal was found by Cheapflights users on 7/8. 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 12/56:10 pm
IAH
- LIS
1 stop33h 10m
United Airlines
Sat 1/95:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 7/8![United Airlines logo]()
$877
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated July 13, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated July 13, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 7/9. 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 stop36h 25m
Turkish Airlines
Tue 8/2510:55 am
LIS
- IAH
1 stop38h 20m
Turkish Airlines
Deal found 7/9![Turkish Airlines logo]()
$803
This Turkish Airlines deal was found by Cheapflights users on 7/10. 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.
Sun 8/99:10 pm
IAH
- OPO
1 stop36h 40m
Turkish Airlines
Tue 8/254:50 pm
OPO
- IAH
1 stop32h 25m
Turkish Airlines
Deal found 7/10![Turkish Airlines logo]()
$836
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Sun 8/97:20 am
IAH
- OPO
1 stop17h 35m
United Airlines
Tue 8/2512:15 pm
OPO
- IAH
2 stops32h 36m
United Airlines
Deal found 7/10![United Airlines logo]()
$864
This United Airlines deal was found by Cheapflights users on 7/9. 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 8/1810:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Tue 8/2512:15 pm
OPO
- IAH
2 stops29h 31m
United Airlines
Deal found 7/9![United Airlines logo]()
$863
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 8/249:10 pm
IAH
- LIS
1 stop20h 25m
Multiple Airlines
Mon 8/316:35 am
LIS
- IAH
2 stops33h 19m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$805
This CheapOair deal was found by Cheapflights users on 7/9. 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.
Mon 8/249:10 pm
IAH
- LIS
1 stop30h 45m
Turkish Airlines
Mon 8/3110:55 am
LIS
- IAH
1 stop38h 20m
Turkish Airlines
Deal found 7/9![Turkish Airlines logo]()
$862
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 8/259:10 pm
IAH
- LIS
1 stop30h 40m
Multiple Airlines
Tue 9/112:30 pm
LIS
- IAH
2 stops27h 24m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$806
This Turkish Airlines deal was found by Cheapflights users on 7/8. 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.
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 7/8![Turkish Airlines logo]()
$822
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
Thu 8/279:10 pm
IAH
- LIS
1 stop20h 10m
Multiple Airlines
Mon 8/316:35 am
LIS
- IAH
2 stops33h 19m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$791
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 8/309:10 pm
IAH
- LIS
1 stop30h 45m
Multiple Airlines
Wed 9/912:30 pm
LIS
- IAH
2 stops26h 15m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$798
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 8/309:10 pm
IAH
- LIS
1 stop30h 45m
Multiple Airlines
Thu 9/1012:30 pm
LIS
- IAH
2 stops26h 15m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$833
This Gotogate deal was found by Cheapflights users on 7/9. 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 7/9![Turkish Airlines logo]()
$862
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 13, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated July 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 10/2112:21 pm
IAH
- LIS
3 stops51h 44m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 8/111:29 pm
IAH
- LIS
3 stops43h 06m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 8/3111:35 am
IAH
- LIS
3 stops25h 20m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 8/107:23 pm
IAH
- LIS
3 stops46h 17m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 10/217:00 am
IAH
- OPO
3 stops34h 20m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$319
This Expedia deal was found by Cheapflights users on 7/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:00 am
IAH
- OPO
1 stop15h 00m
Air Canada
Deal found 7/8![Air Canada logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 9/287:53 pm
IAH
- LIS
2 stops44h 37m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$325
This Delta deal was found by Cheapflights users on 7/8. 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 10/216:00 am
HOU
- OPO
2 stops22h 30m
Delta
Deal found 7/8![Delta logo]()
$334
This United Airlines deal was found by Cheapflights users on 7/8. 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 10/215:15 am
IAH
- OPO
2 stops22h 30m
United Airlines
Deal found 7/8![United Airlines logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 8/47:23 pm
IAH
- LIS
3 stops43h 12m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$335
This oojo deal was found by Cheapflights users on 7/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:10 pm
IAH
- LIS
1 stop14h 45m
British Airways
Deal found 7/8![British Airways logo]()
$346
This Cheapflightsfares deal was found by Cheapflights users on 7/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:50 pm
IAH
- LIS
1 stop17h 00m
British Airways
Deal found 7/9![British Airways logo]()
$349
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 13, 2026.
Round-trip from | $707 (United Airlines) |
|---|---|
One-way from | $294 (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 13, 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
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Mon 11/2
11:50 am-10:40 am
1 stop16h 50m
Lisbon Humberto Delgado
Tue 11/17
12:50 pm-1:31 pm
2 stops30h 41m
$725
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 11/10
9:55 pm-6:55 am
2 stops27h 00m
Lisbon Humberto Delgado
Wed 11/18
5:00 am-2:00 pm
1 stop15h 00m
$727
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 11/11
11:55 am-9:30 am
2 stops15h 35m
Porto
Fri 11/13
12:35 pm-10:43 pm
1 stop16h 08m
$730
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Tue 11/10
10:05 am-3:10 pm
2 stops23h 05m
Lisbon Humberto Delgado
Wed 11/18
5:00 am-9:43 pm
2 stops22h 43m
$739
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Mon 11/2
2:59 pm-3:10 pm
2 stops18h 11m
Lisbon Humberto Delgado
Tue 11/17
5:00 am-9:43 pm
2 stops22h 43m
$739
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Fri 11/13
1:00 pm-9:05 am
2 stops14h 05m
Porto
Wed 11/18
5:00 am-4:30 pm
2 stops17h 30m
$773
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Fri 11/13
6:00 am-9:05 am
2 stops21h 05m
Porto
Tue 11/17
5:00 am-9:43 pm
2 stops22h 43m
$773
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 12/28
4:10 pm-10:25 pm
1 stop24h 15m
Porto
Thu 12/31
6:00 am-6:15 pm
1 stop18h 15m
$778
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 10/21
6:00 am-8:00 am
2 stops20h 00m
Lisbon Humberto Delgado
Wed 10/28
10:00 am-11:09 pm
2 stops18h 09m
$781
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 10/21
6:00 am-8:00 am
2 stops20h 00m
Lisbon Humberto Delgado
Wed 10/28
10:00 am-11:09 pm
2 stops18h 09m
$781
Showing 1-10 of 60 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-OPO
IAH-LIS
HOU-OPO
HOU-LIS
HOU-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-OPO
IAH-LIS
HOU-OPO
HOU-LIS
What is the cheapest month to book a flight from Houston to Portugal?
Currently, November is the cheapest month in which you can book a flight from Houston to Portugal (average of $267). Flying from Houston to Portugal in June is currently the most expensive (average of $1,089). 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 13, 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.
Boarding
7.8
Overall
7.8
Food
7.3
Crew
8.4
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Overall
7.8
Food
7.3
Crew
8.4
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Overall
7.8
Food
7.3
Crew
8.4
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Overall
7.8
Food
7.3
Crew
8.4
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Overall
7.8
Food
7.3
Crew
8.4
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Overall
7.8
Food
7.3
Crew
8.4
Entertainment
7.2
Comfort
7.7
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 13, 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 13, 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$862 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$581 | Average$1,035 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$726 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$841 | FlexibilityNo cancel fee | On-time67% |