$356+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Jun 30 — Jul 71
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 May 31, 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 31, 2026.
This United Airlines deal was found by Cheapflights users on 5/26. 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 11/1610:00 am
IAH
- OPO
1 stop17h 30m
United Airlines
Thu 11/196:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 5/26![United Airlines logo]()
$707
This KLM deal was found by Cheapflights users on 5/28. 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
Wed 11/184:10 pm
OPO
- IAH
1 stop27h 15m
KLM
Deal found 5/28![KLM logo]()
$709
This Travelocity deal was found by Cheapflights users on 5/29. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:10 pm
IAH
- OPO
2 stops17h 55m
Multiple Airlines
Thu 11/197:20 pm
OPO
- IAH
2 stops32h 19m
Multiple Airlines
Deal found 5/29![Multiple Airlines logo]()
$720
This Delta deal was found by Cheapflights users on 5/28. 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 11/161:00 pm
HOU
- OPO
2 stops15h 30m
Delta
Thu 11/195:00 am
OPO
- HOU
2 stops22h 43m
Delta
Deal found 5/28![Delta logo]()
$723
This Orbitz deal was found by Cheapflights users on 5/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/19:28 am
IAH
- OPO
2 stops16h 12m
Iberia
Wed 11/188:40 pm
OPO
- IAH
2 stops18h 03m
Iberia
Deal found 5/28![Iberia logo]()
$730
This KAYAK deal was found by Cheapflights users on 5/28. 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.
Sun 11/14:10 pm
IAH
- OPO
1 stop13h 35m
Lufthansa
Wed 11/1812:35 pm
OPO
- IAH
2 stops17h 39m
Lufthansa
Deal found 5/28![Lufthansa logo]()
$732
This KAYAK deal was found by Cheapflights users on 5/31. 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 12/312:00 pm
IAH
- OPO
1 stop15h 30m
Multiple Airlines
Tue 12/86:00 am
OPO
- IAH
1 stop18h 15m
Multiple Airlines
Deal found 5/31![Multiple Airlines logo]()
$757
This KLM deal was found by Cheapflights users on 5/29. 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 12/61:00 pm
HOU
- OPO
2 stops14h 05m
KLM
Sat 12/1911:00 am
OPO
- HOU
2 stops16h 43m
KLM
Deal found 5/29![KLM logo]()
$781
This American Airlines deal was found by Cheapflights users on 5/29. 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.
Wed 10/146:19 pm
HOU
- OPO
2 stops15h 41m
American Airlines
Wed 10/288:40 pm
OPO
- HOU
2 stops20h 43m
American Airlines
Deal found 5/29![American Airlines logo]()
$786
This British Airways deal was found by Cheapflights users on 5/27. 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 11/163:50 pm
IAH
- FNC
1 stop16h 25m
British Airways
Thu 11/265:00 pm
FNC
- IAH
1 stop27h 05m
British Airways
Deal found 5/27![British Airways logo]()
$826
This British Airways deal was found by Cheapflights users on 5/27. 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.
Wed 11/183:50 pm
IAH
- FNC
1 stop18h 20m
British Airways
Thu 11/265:00 pm
FNC
- IAH
1 stop33h 00m
British Airways
Deal found 5/27![British Airways logo]()
$844
This Delta deal was found by Cheapflights users on 5/27. 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 11/154:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Mon 11/3012:20 pm
LIS
- IAH
1 stop31h 35m
Delta
Deal found 5/27![Delta logo]()
$856
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 31, 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 31, 2026.
This United Airlines deal was found by Cheapflights users on 5/28. 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 11/167:30 am
IAH
- OPO
2 stops20h 00m
United Airlines
Thu 11/196:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 5/28![United Airlines logo]()
$712
This Delta deal was found by Cheapflights users on 5/28. 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 11/161:00 pm
HOU
- OPO
2 stops15h 30m
Delta
Thu 11/195:00 am
OPO
- HOU
2 stops22h 43m
Delta
Deal found 5/28![Delta logo]()
$723
This American Airlines deal was found by Cheapflights users on 5/29. 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.
Wed 10/146:19 pm
HOU
- OPO
2 stops15h 41m
American Airlines
Wed 10/288:40 pm
OPO
- HOU
2 stops20h 43m
American Airlines
Deal found 5/29![American Airlines logo]()
$786
This KLM deal was found by Cheapflights users on 5/30. 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
Wed 10/217:10 pm
OPO
- IAH
1 stop24h 05m
KLM
Deal found 5/30![KLM logo]()
$815
This British Airways deal was found by Cheapflights users on 5/27. 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.
Wed 11/183:50 pm
IAH
- FNC
1 stop18h 20m
British Airways
Mon 11/3012:25 pm
FNC
- IAH
1 stop37h 35m
British Airways
Deal found 5/27![British Airways logo]()
$936
This Finnair deal was found by Cheapflights users on 5/28. 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.
Sun 8/164:40 pm
IAH
- LIS
2 stops24h 45m
Finnair
Mon 8/314:35 pm
LIS
- IAH
2 stops31h 29m
Finnair
Deal found 5/28![Finnair logo]()
$996
This Iberia deal was found by Cheapflights users on 5/28. 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.
Sat 11/2110:11 am
HOU
- OPO
2 stops15h 29m
Multiple Airlines
Sat 11/288:40 pm
OPO
- HOU
2 stops17h 55m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$1,095
This FlightHub deal was found by Cheapflights users on 5/31. 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 8/2211:41 am
IAH
- FNC
2 stops31h 49m
TAP AIR PORTUGAL
Fri 9/1812:40 pm
FNC
- IAH
2 stops28h 15m
TAP AIR PORTUGAL
Deal found 5/31![TAP AIR PORTUGAL logo]()
$1,250
This United Airlines deal was found by Cheapflights users on 5/29. 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 10/2011:20 am
OPO
- IAH
2 stops33h 57m
United Airlines
Deal found 5/29![United Airlines logo]()
$811
This Delta deal was found by Cheapflights users on 5/27. 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 11/184:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Mon 11/3012:20 pm
LIS
- IAH
1 stop31h 35m
Delta
Deal found 5/27![Delta logo]()
$856
This Orbitz deal was found by Cheapflights users on 5/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2212:46 pm
HOU
- FNC
2 stops17h 39m
Iberia
Sun 8/211:20 am
FNC
- HOU
2 stops18h 36m
Iberia
Deal found 5/29![Iberia logo]()
$1,727
This KLM deal was found by Cheapflights users on 5/28. 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 9/153:55 pm
IAH
- OPO
1 stop17h 30m
KLM
Thu 9/2411:35 am
OPO
- IAH
1 stop31h 40m
KLM
Deal found 5/28![KLM logo]()
$894
This United Airlines deal was found by Cheapflights users on 5/28. 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 15m
United Airlines
Wed 10/2111:20 am
OPO
- IAH
2 stops30h 21m
United Airlines
Deal found 5/28![United Airlines logo]()
$816
This Delta deal was found by Cheapflights users on 5/30. 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 10/2110:05 am
HOU
- LIS
2 stops15h 55m
Delta
Wed 10/2810:00 am
LIS
- HOU
2 stops16h 43m
Delta
Deal found 5/30![Delta logo]()
$862
This British Airways deal was found by Cheapflights users on 5/27. 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 11/219:50 pm
IAH
- FNC
1 stop31h 45m
British Airways
Thu 11/265:00 pm
FNC
- IAH
1 stop33h 00m
British Airways
Deal found 5/27![British Airways logo]()
$958
This United Airlines deal was found by Cheapflights users on 5/30. 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 8/3110:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Tue 9/1512:15 pm
OPO
- IAH
2 stops30h 53m
United Airlines
Deal found 5/30![United Airlines logo]()
$890
This Delta deal was found by Cheapflights users on 5/27. 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 10/133:20 pm
IAH
- LIS
1 stop13h 35m
Delta
Sun 10/255:00 am
LIS
- IAH
1 stop14h 25m
Delta
Deal found 5/27![Delta logo]()
$901
This British Airways deal was found by Cheapflights users on 5/27. 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 11/179:50 pm
IAH
- FNC
1 stop36h 20m
British Airways
Sat 11/284:45 pm
FNC
- IAH
1 stop27h 20m
British Airways
Deal found 5/27![British Airways logo]()
$1,010
This KLM deal was found by Cheapflights users on 5/29. 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 8/85:09 pm
IAH
- FNC
2 stops18h 36m
KLM
Wed 8/1910:25 am
FNC
- IAH
1 stop32h 55m
KLM
Deal found 5/29![KLM logo]()
$1,030
This British Airways deal was found by Cheapflights users on 5/27. 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 7/68:23 pm
HOU
- OPO
2 stops17h 42m
Multiple Airlines
Wed 7/228:40 pm
OPO
- HOU
2 stops29h 13m
Multiple Airlines
Deal found 5/27![Multiple Airlines logo]()
$1,203
This United Airlines deal was found by Cheapflights users on 5/27. 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 9/176:40 pm
IAH
- OPO
2 stops30h 30m
United Airlines
Tue 9/2212:15 pm
OPO
- IAH
2 stops31h 21m
United Airlines
Deal found 5/27![United Airlines logo]()
$905
This Delta deal was found by Cheapflights users on 5/27. 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 8/105:20 pm
HOU
- OPO
2 stops23h 10m
Delta
Mon 8/245:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 5/27![Delta logo]()
$941
This KLM deal was found by Cheapflights users on 5/29. 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 8/85:20 pm
HOU
- FNC
2 stops18h 25m
KLM
Wed 8/1910:25 am
FNC
- HOU
2 stops36h 00m
KLM
Deal found 5/29![KLM logo]()
$1,046
This TAP AIR PORTUGAL deal was found by Cheapflights users on 5/27. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/131:46 pm
IAH
- FNC
2 stops17h 44m
TAP AIR PORTUGAL
Tue 11/1711:10 am
FNC
- IAH
2 stops29h 44m
TAP AIR PORTUGAL
Deal found 5/27![TAP AIR PORTUGAL logo]()
$1,292
This British Airways deal was found by Cheapflights users on 5/27. 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 11/159:28 am
IAH
- FNC
2 stops46h 47m
British Airways
Thu 11/265:00 pm
FNC
- IAH
1 stop33h 00m
British Airways
Deal found 5/27![British Airways logo]()
$1,069
This United Airlines deal was found by Cheapflights users on 5/27. 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 11/185:05 pm
IAH
- LIS
1 stop11h 10m
United Airlines
Sat 11/285:00 am
LIS
- IAH
2 stops19h 42m
United Airlines
Deal found 5/27![United Airlines logo]()
$906
This British Airways deal was found by Cheapflights users on 5/27. 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 11/169:28 am
IAH
- FNC
2 stops46h 52m
British Airways
Thu 11/265:00 pm
FNC
- IAH
1 stop27h 05m
British Airways
Deal found 5/27![British Airways logo]()
$1,069
This Delta deal was found by Cheapflights users on 5/27. 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 8/1610:50 am
HOU
- LIS
2 stops16h 00m
Delta
Tue 8/255:00 am
LIS
- HOU
2 stops23h 05m
Delta
Deal found 5/27![Delta logo]()
$974
This United Airlines deal was found by Cheapflights users on 5/29. 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 9/157:41 am
IAH
- OPO
2 stops16h 34m
United Airlines
Thu 9/246:00 am
OPO
- IAH
2 stops19h 01m
United Airlines
Deal found 5/29![United Airlines logo]()
$908
This Delta deal was found by Cheapflights users on 5/29. 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 7/75:17 pm
HOU
- LIS
2 stops19h 28m
Delta
Tue 7/145:00 am
LIS
- HOU
2 stops22h 51m
Delta
Deal found 5/29![Delta logo]()
$986
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated May 31, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated May 31, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 5/28. 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 6/68:55 pm
IAH
- LIS
2 stops34h 05m
Multiple Airlines
Thu 6/116:10 am
LIS
- IAH
2 stops37h 45m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$1,115
This Lufthansa deal was found by Cheapflights users on 5/27. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/83:35 pm
IAH
- OPO
1 stop18h 05m
Lufthansa
Mon 6/294:35 pm
OPO
- IAH
1 stop27h 00m
Lufthansa
Deal found 5/27![Lufthansa logo]()
$1,144
This Mytrip deal was found by Cheapflights users on 5/27. 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.
Tue 6/96:30 am
IAH
- LIS
2 stops33h 15m
Multiple Airlines
Tue 6/166:15 am
LIS
- IAH
3 stops34h 55m
Multiple Airlines
Deal found 5/27![Multiple Airlines logo]()
$1,095
This Kiwi.com deal was found by Cheapflights users on 5/28. 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 6/96:30 am
IAH
- LIS
2 stops33h 15m
Multiple Airlines
Wed 6/1710:20 am
LIS
- IAH
1 stop27h 42m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$1,146
This Kiwi.com deal was found by Cheapflights users on 5/28. 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 6/118:37 pm
IAH
- LIS
1 stop35h 08m
Multiple Airlines
Thu 6/186:10 am
LIS
- IAH
2 stops37h 45m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$1,102
This Mytrip deal was found by Cheapflights users on 5/27. 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.
Tue 6/166:30 am
IAH
- LIS
2 stops33h 15m
Multiple Airlines
Tue 6/236:15 am
LIS
- IAH
3 stops34h 35m
Multiple Airlines
Deal found 5/27![Multiple Airlines logo]()
$1,074
This Lufthansa deal was found by Cheapflights users on 5/27. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/163:35 pm
IAH
- LIS
1 stop18h 00m
Lufthansa
Tue 6/234:20 pm
LIS
- IAH
1 stop27h 15m
Lufthansa
Deal found 5/27![Lufthansa logo]()
$1,141
This Mytrip deal was found by Cheapflights users on 5/28. 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.
Tue 6/166:30 am
IAH
- LIS
2 stops33h 15m
Multiple Airlines
Sun 6/216:10 am
LIS
- IAH
3 stops43h 15m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$1,158
This KLM deal was found by Cheapflights users on 5/29. 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 6/265:00 pm
IAH
- OPO
1 stop23h 05m
KLM
Fri 7/35:00 am
OPO
- IAH
1 stop14h 20m
KLM
Deal found 5/29![KLM logo]()
$1,215
This Delta deal was found by Cheapflights users on 5/29. 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 6/262:38 pm
IAH
- OPO
2 stops18h 52m
Delta
Fri 7/35:00 am
OPO
- IAH
1 stop14h 20m
Delta
Deal found 5/29![Delta logo]()
$1,224
This United Airlines deal was found by Cheapflights users on 5/29. 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 6/267:00 am
IAH
- OPO
2 stops18h 00m
United Airlines
Fri 7/36:00 am
OPO
- IAH
2 stops23h 43m
United Airlines
Deal found 5/29![United Airlines logo]()
$1,230
This Mytrip deal was found by Cheapflights users on 5/30. 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.
Mon 6/2911:45 am
IAH
- LIS
2 stops25h 30m
Multiple Airlines
Mon 7/611:00 pm
LIS
- IAH
2 stops26h 38m
Multiple Airlines
Deal found 5/30![Multiple Airlines logo]()
$1,178
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 31, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated May 31, 2026.
This KLM deal was found by Cheapflights users on 5/27. 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 10/281:15 pm
IAH
- LIS
2 stops13h 45m
KLM
Deal found 5/27![KLM logo]()
$356
This Delta deal was found by Cheapflights users on 5/27. 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 10/2810:05 am
HOU
- LIS
2 stops16h 55m
Delta
Deal found 5/27![Delta logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 5/28. 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 7/77:23 pm
IAH
- LIS
3 stops57h 37m
Multiple Airlines
Deal found 5/28![Multiple Airlines logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 5/29. 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 8/209:42 am
IAH
- OPO
3 stops28h 43m
Multiple Airlines
Deal found 5/29![Multiple Airlines logo]()
$408
This Cheapflightsfares deal was found by Cheapflights users on 5/30. 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 10/79:10 pm
IAH
- LIS
1 stop14h 45m
British Airways
Deal found 5/30![British Airways logo]()
$413
This Kiwi.com deal was found by Cheapflights users on 5/27. 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 7/297:23 pm
IAH
- LIS
2 stops39h 42m
Multiple Airlines
Deal found 5/27![Multiple Airlines logo]()
$422
This Kiwi.com deal was found by Cheapflights users on 5/31. 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 7/67:23 pm
IAH
- OPO
3 stops41h 12m
Multiple Airlines
Deal found 5/31![Multiple Airlines logo]()
$425
This Justfly.com deal was found by Cheapflights users on 5/27. 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.
Sat 9/197:50 pm
IAH
- LIS
2 stops31h 30m
Air Canada
Deal found 5/27![Air Canada logo]()
$426
This Kiwi.com deal was found by Cheapflights users on 5/31. 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 9/1210:15 pm
IAH
- LIS
3 stops40h 50m
Multiple Airlines
Deal found 5/31![Multiple Airlines logo]()
$427
This Kiwi.com deal was found by Cheapflights users on 5/27. 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 8/234:52 pm
IAH
- OPO
2 stops34h 33m
Multiple Airlines
Deal found 5/27![Multiple Airlines logo]()
$430
This United Airlines deal was found by Cheapflights users on 5/28. 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
Deal found 5/28![United Airlines logo]()
$431
This Delta deal was found by Cheapflights users on 5/29. 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 10/76:00 am
HOU
- LIS
2 stops23h 15m
Delta
Deal found 5/29![Delta logo]()
$432
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 31, 2026.
Round-trip from | $707 (United Airlines) |
|---|---|
One-way from | $356 (KLM) |
Popular in | June |
Cheapest in | April |
Average price | $1,193 |
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 31, 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
Mon 11/16
7:30 am-9:30 am
2 stops20h 00m
Porto
Thu 11/19
6:00 am-6:15 pm
1 stop18h 15m
$712
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Mon 11/16
1:00 pm-10:30 am
2 stops15h 30m
Porto
Thu 11/19
5:00 am-9:43 pm
2 stops22h 43m
$723
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Wed 10/14
6:19 pm-4:00 pm
2 stops15h 41m
Porto
Wed 10/28
8:40 pm-12:23 pm
2 stops20h 43m
$786
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
10:00 am-7:10 am
1 stop15h 10m
Porto
Tue 10/20
11:20 am-3:17 pm
2 stops33h 57m
$811
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
12:55 pm-10:30 am
1 stop15h 35m
Porto
Wed 10/21
7:10 pm-1:15 pm
1 stop24h 05m
$815
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
9:45 pm-7:00 am
2 stops27h 15m
Porto
Wed 10/21
11:20 am-11:41 am
2 stops30h 21m
$816
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 11/18
4:05 pm-11:20 am
1 stop13h 15m
Lisbon Humberto Delgado
Mon 11/30
12:20 pm-1:55 pm
1 stop31h 35m
$856
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 10/21
10:05 am-8:00 am
2 stops15h 55m
Lisbon Humberto Delgado
Wed 10/28
10:00 am-9:43 pm
2 stops16h 43m
$862
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 8/31
10:00 am-7:00 am
1 stop15h 00m
Porto
Tue 9/15
12:15 pm-1:08 pm
2 stops30h 53m
$890
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 9/15
3:55 pm-3:25 pm
1 stop17h 30m
Porto
Thu 9/24
11:35 am-1:15 pm
1 stop31h 40m
$894
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-LIS
HOU-LIS
IAH-OPO
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
HOU-LIS
IAH-OPO
HOU-OPO
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.
How far ahead should I book a flight from Houston to Portugal?
The best time to book flights from Houston to Portugal is 70 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 May 31, 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.
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.8
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 31, 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 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$395 | Average$1,016 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$466 | Average$868 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$940 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$768 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$874 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$581 | Average$1,005 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$743 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$913 | FlexibilityNo cancel fee | On-time67% |