$334+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Jun 9 — Jun 161
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 May 10, 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 May 10, 2026.
This Delta deal was found by Cheapflights users on 5/7. 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 11/1812:55 pm
IAH
- OPO
1 stop14h 10m
Delta
Fri 11/275:00 am
OPO
- IAH
1 stop14h 30m
Delta
Deal found 5/7![Delta logo]()
$710
This Air France deal was found by Cheapflights users on 5/9. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/181:15 pm
IAH
- OPO
2 stops15h 15m
Multiple Airlines
Fri 11/275:00 am
OPO
- IAH
1 stop14h 05m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$715
This KLM deal was found by Cheapflights users on 5/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/181:15 pm
IAH
- OPO
2 stops13h 50m
KLM
Fri 11/275:40 am
OPO
- IAH
2 stops19h 19m
KLM
Deal found 5/9![KLM logo]()
$732
This Air Canada deal was found by Cheapflights users on 5/7. 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.
Wed 11/1811:55 am
IAH
- OPO
2 stops21h 20m
Air Canada
Fri 11/276:00 am
OPO
- IAH
2 stops21h 44m
Air Canada
Deal found 5/7![Air Canada logo]()
$740
This Justfly.com deal was found by Cheapflights users on 5/6. 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 10/219:05 pm
IAH
- LIS
1 stop20h 40m
Turkish Airlines
Wed 10/285:55 am
LIS
- IAH
1 stop19h 15m
Turkish Airlines
Deal found 5/6![Turkish Airlines logo]()
$759
This United Airlines deal was found by Cheapflights users on 5/8. 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.
Mon 10/129:40 pm
IAH
- OPO
2 stops27h 20m
United Airlines
Wed 10/2112:45 pm
OPO
- IAH
2 stops34h 00m
United Airlines
Deal found 5/8![United Airlines logo]()
$766
This United Airlines deal was found by Cheapflights users on 5/5. 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 11/312:10 pm
IAH
- LIS
1 stop15h 40m
United Airlines
Thu 11/125:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 5/5![United Airlines logo]()
$767
This United Airlines deal was found by Cheapflights users on 5/5. 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 11/17:40 am
IAH
- LIS
1 stop18h 30m
United Airlines
Wed 11/115:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 5/5![United Airlines logo]()
$768
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Wed 11/112:30 pm
IAH
- LIS
1 stop11h 40m
United Airlines
Thu 11/195:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 5/9![United Airlines logo]()
$769
This Delta deal was found by Cheapflights users on 5/6. 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.
Sun 11/294:05 pm
IAH
- LIS
1 stop17h 05m
Delta
Wed 12/211:25 am
LIS
- IAH
1 stop32h 05m
Delta
Deal found 5/6![Delta logo]()
$770
This United Airlines deal was found by Cheapflights users on 5/6. 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 11/2410:15 am
IAH
- LIS
2 stops17h 35m
United Airlines
Thu 12/35:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 5/6![United Airlines logo]()
$772
This United Airlines deal was found by Cheapflights users on 5/6. 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 11/259:45 am
IAH
- LIS
2 stops16h 25m
United Airlines
Thu 12/35:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 5/6![United Airlines logo]()
$773
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 May 10, 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 May 10, 2026.
This KLM deal was found by Cheapflights users on 5/7. 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 10/1612:55 pm
IAH
- OPO
1 stop15h 35m
KLM
Tue 10/204:20 pm
OPO
- IAH
1 stop26h 55m
KLM
Deal found 5/7![KLM logo]()
$816
This United Airlines deal was found by Cheapflights users on 5/5. 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 10/168:11 pm
IAH
- OPO
2 stops28h 49m
United Airlines
Wed 10/2112:45 pm
OPO
- IAH
2 stops32h 06m
United Airlines
Deal found 5/5![United Airlines logo]()
$816
This Delta deal was found by Cheapflights users on 5/10. 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 10/1411:50 am
IAH
- LIS
2 stops17h 25m
Delta
Tue 10/2011:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 5/10![Delta logo]()
$842
This Iberia deal was found by Cheapflights users on 5/8. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:19 pm
HOU
- OPO
2 stops15h 41m
Multiple Airlines
Wed 10/2112:25 pm
OPO
- HOU
2 stops17h 28m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$843
This Finnair deal was found by Cheapflights users on 5/7. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:08 pm
IAH
- LIS
2 stops19h 42m
Finnair
Mon 10/124:35 pm
LIS
- IAH
2 stops31h 32m
Finnair
Deal found 5/7![Finnair logo]()
$983
This American Airlines deal was found by Cheapflights users on 5/7. 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 10/46:19 pm
HOU
- OPO
2 stops15h 41m
American Airlines
Sun 10/1812:25 pm
OPO
- HOU
2 stops17h 28m
American Airlines
Deal found 5/7![American Airlines logo]()
$1,036
This Priceline deal was found by Cheapflights users on 5/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/67:42 pm
IAH
- FNC
2 stops57h 48m
British Airways
Sat 6/131:10 pm
FNC
- IAH
1 stop30h 10m
British Airways
Deal found 5/7![British Airways logo]()
$1,551
This United Airlines deal was found by Cheapflights users on 5/10. 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 10/139:30 am
IAH
- LIS
2 stops17h 50m
United Airlines
Thu 10/225:05 am
LIS
- IAH
2 stops25h 09m
United Airlines
Deal found 5/10![United Airlines logo]()
$850
This Delta deal was found by Cheapflights users on 5/10. 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 10/1410:05 am
HOU
- LIS
2 stops19h 10m
Delta
Wed 10/215:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 5/10![Delta logo]()
$851
This KLM deal was found by Cheapflights users on 5/5. 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.
Sun 11/11:00 pm
HOU
- LIS
2 stops14h 00m
KLM
Thu 11/125:00 am
LIS
- HOU
2 stops17h 30m
KLM
Deal found 5/5![KLM logo]()
$877
This Expedia deal was found by Cheapflights users on 5/8. 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.
Mon 6/226:48 pm
HOU
- FNC
2 stops36h 07m
Iberia
Mon 6/291:20 pm
FNC
- HOU
2 stops36h 31m
Iberia
Deal found 5/8![Iberia logo]()
$1,939
This United Airlines deal was found by Cheapflights users on 5/7. 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 9/159:50 am
IAH
- OPO
2 stops15h 10m
United Airlines
Thu 9/2411:50 am
OPO
- IAH
2 stops31h 30m
United Airlines
Deal found 5/7![United Airlines logo]()
$895
This Delta deal was found by Cheapflights users on 5/6. 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 7/61:10 pm
HOU
- OPO
2 stops15h 20m
Delta
Wed 8/512:40 pm
OPO
- HOU
2 stops16h 06m
Delta
Deal found 5/6![Delta logo]()
$939
This KLM deal was found by Cheapflights users on 5/5. 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 10/1512:55 pm
IAH
- LIS
1 stop13h 05m
KLM
Sat 10/2411:55 am
LIS
- IAH
1 stop32h 35m
KLM
Deal found 5/5![KLM logo]()
$947
This United Airlines deal was found by Cheapflights users on 5/7. 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 10/710:00 am
IAH
- LIS
1 stop17h 20m
United Airlines
Mon 10/127:25 am
LIS
- IAH
1 stop36h 10m
United Airlines
Deal found 5/7![United Airlines logo]()
$922
This Delta deal was found by Cheapflights users on 5/7. 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 9/2512:55 pm
IAH
- OPO
2 stops20h 30m
Delta
Mon 10/55:00 am
OPO
- IAH
1 stop14h 15m
Delta
Deal found 5/7![Delta logo]()
$946
This KLM deal was found by Cheapflights users on 5/7. 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.
Sun 7/2612:50 pm
HOU
- OPO
2 stops15h 50m
Multiple Airlines
Thu 8/61:25 pm
OPO
- HOU
2 stops15h 21m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$1,212
This United Airlines deal was found by Cheapflights users on 5/8. 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 8/265:15 am
IAH
- LIS
2 stops23h 50m
United Airlines
Fri 9/45:05 am
LIS
- IAH
2 stops18h 18m
United Airlines
Deal found 5/8![United Airlines logo]()
$953
This Delta deal was found by Cheapflights users on 5/5. 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.
Sun 8/91:13 pm
HOU
- LIS
2 stops22h 37m
Delta
Tue 8/189:50 am
LIS
- HOU
2 stops18h 56m
Delta
Deal found 5/5![Delta logo]()
$961
This United Airlines deal was found by Cheapflights users on 5/5. 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 9/56:17 pm
IAH
- OPO
1 stop30h 38m
United Airlines
Thu 9/1012:35 pm
OPO
- IAH
1 stop16h 55m
United Airlines
Deal found 5/5![United Airlines logo]()
$964
This Delta deal was found by Cheapflights users on 5/10. 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 10/121:00 pm
HOU
- LIS
2 stops22h 50m
Delta
Thu 10/225:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 5/10![Delta logo]()
$988
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Sun 7/58:25 pm
IAH
- OPO
2 stops28h 35m
United Airlines
Tue 7/1412:15 pm
OPO
- IAH
2 stops33h 03m
United Airlines
Deal found 5/9![United Airlines logo]()
$968
This Delta deal was found by Cheapflights users on 5/6. 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 7/46:00 am
HOU
- OPO
2 stops22h 20m
Delta
Wed 8/512:40 pm
OPO
- HOU
2 stops16h 06m
Delta
Deal found 5/6![Delta logo]()
$999
This KLM deal was found by Cheapflights users on 5/8. 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.
Thu 6/45:54 pm
IAH
- FNC
2 stops42h 46m
KLM
Tue 6/96:30 pm
FNC
- IAH
1 stop24h 50m
KLM
Deal found 5/8![KLM logo]()
$1,456
This Mytrip deal was found by Cheapflights users on 5/6. 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.
Fri 7/104:20 pm
IAH
- FNC
2 stops22h 25m
Multiple Airlines
Fri 7/174:05 am
FNC
- IAH
2 stops23h 56m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$1,625
This United Airlines deal was found by Cheapflights users on 5/6. 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.
Thu 9/247:45 am
IAH
- LIS
2 stops19h 35m
United Airlines
Sun 9/275:05 am
LIS
- IAH
2 stops25h 18m
United Airlines
Deal found 5/6![United Airlines logo]()
$1,037
This Delta deal was found by Cheapflights users on 5/8. 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.
Fri 7/36:00 am
HOU
- LIS
2 stops23h 15m
Delta
Thu 7/165:35 am
LIS
- HOU
2 stops22h 16m
Delta
Deal found 5/8![Delta logo]()
$1,067
This Delta deal was found by Cheapflights users on 5/8. 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.
Thu 10/226:00 am
HOU
- OPO
2 stops22h 30m
Delta
Sun 11/15:00 am
OPO
- HOU
2 stops22h 43m
Delta
Deal found 5/8![Delta logo]()
$1,070
This Mytrip deal was found by Cheapflights users on 5/7. 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.
Sat 6/67:20 am
IAH
- FNC
3 stops35h 50m
Multiple Airlines
Sat 6/135:35 am
FNC
- IAH
3 stops35h 35m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$1,763
This United Airlines deal was found by Cheapflights users on 5/6. 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 7/16:01 am
IAH
- LIS
2 stops21h 19m
United Airlines
Thu 7/97:25 am
LIS
- IAH
2 stops23h 20m
United Airlines
Deal found 5/6![United Airlines logo]()
$1,173
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated May 10, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated May 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 5/73:50 pm
IAH
- OPO
1 stop17h 35m
Air France
Wed 5/205:55 am
OPO
- IAH
2 stops17h 35m
Air France
Deal found 5/6![Air France logo]()
$961
This KLM deal was found by Cheapflights users on 5/6. 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 5/73:50 pm
IAH
- OPO
1 stop17h 35m
KLM
Wed 5/205:00 am
OPO
- IAH
1 stop14h 20m
KLM
Deal found 5/6![KLM logo]()
$963
This Delta deal was found by Cheapflights users on 5/6. 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 5/73:50 pm
IAH
- OPO
1 stop17h 35m
Delta
Wed 5/205:00 am
OPO
- IAH
1 stop14h 20m
Delta
Deal found 5/6![Delta logo]()
$964
This Delta deal was found by Cheapflights users on 5/6. 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 5/710:27 am
HOU
- OPO
2 stops22h 58m
Delta
Wed 5/205:00 am
OPO
- HOU
2 stops23h 26m
Delta
Deal found 5/6![Delta logo]()
$978
This Gotogate deal was found by Cheapflights users on 5/7. 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 5/812:00 pm
IAH
- LIS
1 stop17h 05m
Multiple Airlines
Thu 5/215:55 am
LIS
- IAH
2 stops20h 04m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$1,036
This KLM deal was found by Cheapflights users on 5/8. 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.
Sat 5/99:44 am
IAH
- OPO
2 stops16h 46m
Multiple Airlines
Fri 5/225:55 am
OPO
- IAH
2 stops17h 35m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$986
This Delta deal was found by Cheapflights users on 5/9. 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.
Sun 5/103:50 pm
IAH
- OPO
1 stop17h 35m
Delta
Sat 5/235:00 am
OPO
- IAH
1 stop14h 20m
Delta
Deal found 5/9![Delta logo]()
$1,028
This KLM deal was found by Cheapflights users on 5/7. 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 5/123:50 pm
IAH
- OPO
1 stop17h 35m
KLM
Wed 5/205:00 am
OPO
- IAH
1 stop14h 20m
KLM
Deal found 5/7![KLM logo]()
$968
This United Airlines deal was found by Cheapflights users on 5/7. 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 5/127:35 am
IAH
- OPO
2 stops20h 10m
United Airlines
Wed 5/206:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 5/7![United Airlines logo]()
$971
This Delta deal was found by Cheapflights users on 5/8. 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.
Tue 5/122:45 pm
IAH
- OPO
2 stops18h 40m
Delta
Wed 5/205:00 am
OPO
- IAH
1 stop14h 20m
Delta
Deal found 5/8![Delta logo]()
$972
This Delta deal was found by Cheapflights users on 5/10. 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 5/1210:27 am
HOU
- OPO
2 stops22h 58m
Delta
Wed 5/205:00 am
OPO
- HOU
2 stops23h 26m
Delta
Deal found 5/10![Delta logo]()
$982
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Tue 6/2311:52 am
IAH
- LIS
1 stop17h 28m
Multiple Airlines
Tue 6/303:00 pm
LIS
- IAH
1 stop31h 34m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$1,038
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 May 10, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated May 10, 2026.
This KLM deal was found by Cheapflights users on 5/7. 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.
Sun 11/11:00 pm
HOU
- OPO
2 stops14h 05m
KLM
Deal found 5/7![KLM logo]()
$334
This KLM deal was found by Cheapflights users on 5/7. 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.
Sun 11/112:55 pm
IAH
- OPO
1 stop14h 10m
KLM
Deal found 5/7![KLM logo]()
$334
This United Airlines deal was found by Cheapflights users on 5/10. 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 10/249:40 pm
IAH
- OPO
2 stops30h 50m
United Airlines
Deal found 5/10![United Airlines logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 7/147:24 pm
IAH
- LIS
3 stops46h 16m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$353
This FlightHub deal was found by Cheapflights users on 5/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/174:45 pm
IAH
- LIS
2 stops34h 35m
Air Canada
Deal found 5/10![Air Canada logo]()
$359
This United Airlines deal was found by Cheapflights users on 5/10. 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 10/1712:30 pm
IAH
- LIS
3 stops38h 50m
United Airlines
Deal found 5/10![United Airlines logo]()
$364
This Delta deal was found by Cheapflights users on 5/10. 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 10/156:00 am
HOU
- OPO
2 stops22h 30m
Delta
Deal found 5/10![Delta logo]()
$384
This Expedia deal was found by Cheapflights users on 5/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:19 pm
HOU
- LIS
2 stops18h 06m
Iberia
Deal found 5/10![Iberia logo]()
$418
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 9/126:42 pm
IAH
- LIS
3 stops44h 23m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$419
This FlightHub deal was found by Cheapflights users on 5/6. 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.
Sat 9/264:45 pm
IAH
- LIS
2 stops34h 35m
Air Canada
Deal found 5/6![Air Canada logo]()
$426
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Sat 8/19:58 pm
IAH
- LIS
2 stops42h 27m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$430
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 7/128:37 pm
IAH
- LIS
2 stops39h 48m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$431
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 May 10, 2026.
Round-trip from | $759 (Justfly.com) |
|---|---|
One-way from | $334 (KLM) |
Popular in | June |
Cheapest in | April |
Average price | $1,139 |
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 May 10, 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
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
12:55 pm-10:30 am
1 stop15h 35m
Porto
Tue 10/20
4:20 pm-1:15 pm
1 stop26h 55m
$816
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
8:11 pm-7:00 am
2 stops28h 49m
Porto
Wed 10/21
12:45 pm-2:51 pm
2 stops32h 06m
$816
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 10/14
11:50 am-11:15 am
2 stops17h 25m
Lisbon Humberto Delgado
Tue 10/20
11:55 am-1:15 pm
1 stop31h 20m
$842
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Mon 10/12
6:19 pm-4:00 pm
2 stops15h 41m
Porto
Wed 10/21
12:25 pm-11:53 pm
2 stops17h 28m
$843
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 10/13
9:30 am-9:20 am
2 stops17h 50m
Lisbon Humberto Delgado
Thu 10/22
5:05 am-12:14 am
2 stops25h 09m
$850
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 10/14
10:05 am-11:15 am
2 stops19h 10m
Lisbon Humberto Delgado
Wed 10/21
5:00 am-9:43 pm
2 stops22h 43m
$851
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Sun 11/1
1:00 pm-9:00 am
2 stops14h 00m
Lisbon Humberto Delgado
Thu 11/12
5:00 am-4:30 pm
2 stops17h 30m
$877
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 9/15
9:50 am-7:00 am
2 stops15h 10m
Porto
Thu 9/24
11:50 am-1:20 pm
2 stops31h 30m
$895
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 10/7
10:00 am-9:20 am
1 stop17h 20m
Lisbon Humberto Delgado
Mon 10/12
7:25 am-1:35 pm
1 stop36h 10m
$922
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Mon 7/6
1:10 pm-10:30 am
2 stops15h 20m
Porto
Wed 8/5
12:40 pm-10:46 pm
2 stops16h 06m
$939
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
HOU-OPO
IAH-LIS
HOU-LIS
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-OPO
HOU-OPO
IAH-LIS
HOU-LIS
How far ahead should I book a flight from Houston to Portugal?
The best time to book flights from Houston to Portugal is 42 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.
What is the cheapest month to book a flight from Houston to Portugal?
Currently, March is the cheapest month in which you can book a flight from Houston to Portugal (average of $395). Flying from Houston to Portugal in June is currently the most expensive (average of $961). 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.
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 May 10, 2026.
Get a feel of what it's like to fly with Delta,KLM, 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
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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 May 10, 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 8 airlines flying from Houston to Portugal
Discover the top 8 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 May 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$395 | Average$627 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$466 | Average$866 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$854 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$830 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$862 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$583 | Average$1,017 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$743 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$959 | FlexibilityNo cancel fee | On-time67% |