$259+ 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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Mar 26 — Apr 21
1 adult, Economy
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Find cheap flights from Houston to Portugal with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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 February 24, 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 February 24, 2026.
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 11/162:30 pm
IAH
- OPO
1 stop13h 00m
United Airlines
Thu 11/266:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 2/21![United Airlines logo]()
$488
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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
- OPO
1 stop12h 25m
Delta
Fri 11/205:00 am
OPO
- IAH
1 stop14h 30m
Delta
Deal found 2/21![Delta logo]()
$490
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1712:00 pm
IAH
- OPO
2 stops15h 30m
United Airlines
Thu 11/266:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 2/21![United Airlines logo]()
$493
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 11/167:00 am
IAH
- OPO
2 stops21h 30m
Delta
Fri 11/205:00 am
OPO
- IAH
1 stop14h 30m
Delta
Deal found 2/21![Delta logo]()
$494
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 11/183:30 pm
IAH
- OPO
1 stop17h 55m
Delta
Thu 11/2611:15 am
OPO
- IAH
1 stop32h 15m
Delta
Deal found 2/21![Delta logo]()
$495
This Gotogate deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 11/1612:10 pm
IAH
- OPO
2 stops17h 55m
Multiple Airlines
Mon 11/234:05 pm
OPO
- IAH
1 stop28h 05m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$503
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 11/184:30 pm
IAH
- OPO
1 stop16h 45m
United Airlines
Fri 11/206:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 2/21![United Airlines logo]()
$504
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 11/161:35 pm
IAH
- OPO
1 stop13h 55m
United Airlines
Wed 11/2512:30 pm
OPO
- IAH
1 stop35h 45m
United Airlines
Deal found 2/21![United Airlines logo]()
$509
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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
- OPO
1 stop12h 25m
Delta
Wed 11/2511:25 am
OPO
- IAH
1 stop32h 30m
Delta
Deal found 2/21![Delta logo]()
$510
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 11/172:30 pm
IAH
- OPO
2 stops13h 00m
United Airlines
Tue 11/2412:35 pm
OPO
- IAH
2 stops25h 45m
United Airlines
Deal found 2/21![United Airlines logo]()
$512
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1712:00 pm
IAH
- OPO
2 stops15h 30m
United Airlines
Mon 11/2312:30 pm
OPO
- IAH
1 stop31h 40m
United Airlines
Deal found 2/21![United Airlines logo]()
$513
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 11/183:30 pm
IAH
- OPO
1 stop24h 55m
Delta
Wed 11/2511:25 am
OPO
- IAH
1 stop32h 30m
Delta
Deal found 2/21![Delta logo]()
$515
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 February 24, 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 February 24, 2026.
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 4/256:25 am
IAH
- LIS
2 stops22h 20m
Delta
Wed 5/65:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/24![Delta logo]()
$541
This KLM deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 5/13:20 pm
IAH
- LIS
1 stop13h 35m
KLM
Fri 5/83:35 pm
LIS
- IAH
1 stop27h 40m
KLM
Deal found 2/22![KLM logo]()
$541
This British Airways deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 4/243:30 pm
IAH
- LIS
1 stop25h 40m
British Airways
Tue 5/54:30 pm
LIS
- IAH
1 stop26h 55m
British Airways
Deal found 2/24![British Airways logo]()
$560
This American Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/154:18 pm
HOU
- OPO
2 stops17h 42m
American Airlines
Wed 4/2212:25 pm
OPO
- HOU
2 stops17h 22m
American Airlines
Deal found 2/22![American Airlines logo]()
$671
This Expedia deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/84:18 pm
HOU
- OPO
2 stops21h 42m
Iberia
Wed 4/158:40 pm
OPO
- HOU
2 stops29h 11m
Iberia
Deal found 2/22![Iberia logo]()
$682
This KAYAK deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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.
Wed 4/228:21 pm
HOU
- LIS
2 stops20h 54m
Multiple Airlines
Sat 5/26:35 am
LIS
- HOU
2 stops23h 12m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$721
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 7/612:00 pm
IAH
- OPO
1 stop12h 55m
United Airlines
Tue 7/2112:15 pm
OPO
- IAH
2 stops27h 58m
United Airlines
Deal found 2/21![United Airlines logo]()
$892
This KLM deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 5/43:50 pm
IAH
- OPO
1 stop17h 35m
KLM
Mon 5/117:00 pm
OPO
- IAH
1 stop24h 15m
KLM
Deal found 2/21![KLM logo]()
$599
This Delta deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/1510:41 am
IAH
- OPO
2 stops17h 59m
Delta
Wed 4/225:00 am
OPO
- IAH
1 stop14h 15m
Delta
Deal found 2/22![Delta logo]()
$649
This British Airways deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/910:45 pm
IAH
- LIS
1 stop18h 10m
British Airways
Mon 3/166:35 pm
LIS
- IAH
1 stop25h 30m
British Airways
Deal found 2/21![British Airways logo]()
$670
This TAP AIR PORTUGAL deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/201:38 pm
IAH
- FNC
2 stops28h 32m
TAP AIR PORTUGAL
Tue 3/246:15 pm
FNC
- IAH
2 stops34h 24m
TAP AIR PORTUGAL
Deal found 2/23![TAP AIR PORTUGAL logo]()
$1,406
This Delta deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 5/66:00 am
HOU
- LIS
2 stops22h 55m
Delta
Mon 5/115:00 am
LIS
- HOU
2 stops23h 26m
Delta
Deal found 2/23![Delta logo]()
$670
This Finnair deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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.
Mon 3/92:09 pm
IAH
- LIS
2 stops16h 56m
Finnair
Sun 3/153:55 pm
LIS
- IAH
1 stop34h 05m
Finnair
Deal found 2/21![Finnair logo]()
$1,504
This British Airways deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/286:22 pm
IAH
- LIS
2 stops17h 43m
Multiple Airlines
Fri 4/1712:30 pm
LIS
- IAH
2 stops17h 29m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$819
This KLM deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/193:20 pm
IAH
- FNC
1 stop35h 50m
KLM
Sun 4/266:40 pm
FNC
- IAH
2 stops29h 52m
KLM
Deal found 2/21![KLM logo]()
$753
This Delta deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/185:22 pm
HOU
- LIS
2 stops19h 08m
Delta
Wed 4/15:00 am
LIS
- HOU
2 stops23h 42m
Delta
Deal found 2/22![Delta logo]()
$720
This United Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 7/256:00 am
IAH
- OPO
2 stops19h 00m
United Airlines
Tue 8/49:00 am
OPO
- IAH
2 stops16h 27m
United Airlines
Deal found 2/23![United Airlines logo]()
$911
This Mytrip deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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.
Sun 4/197:05 am
IAH
- FNC
2 stops31h 55m
Multiple Airlines
Sun 4/268:45 am
FNC
- IAH
3 stops43h 45m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$845
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/286:00 am
HOU
- LIS
2 stops23h 15m
Delta
Fri 4/175:35 am
LIS
- HOU
2 stops23h 33m
Delta
Deal found 2/21![Delta logo]()
$723
This Orbitz deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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.
Fri 7/36:23 pm
HOU
- OPO
2 stops19h 37m
Iberia
Mon 7/204:40 pm
OPO
- HOU
2 stops37h 12m
Iberia
Deal found 2/24![Iberia logo]()
$1,028
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 7/307:46 am
IAH
- LIS
2 stops19h 34m
United Airlines
Thu 8/611:25 am
LIS
- IAH
1 stop14h 13m
United Airlines
Deal found 2/21![United Airlines logo]()
$938
This KLM deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 8/212:55 pm
IAH
- OPO
1 stop15h 30m
KLM
Fri 8/148:15 pm
OPO
- IAH
1 stop23h 00m
KLM
Deal found 2/23![KLM logo]()
$857
This Delta deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/242:13 pm
HOU
- LIS
2 stops15h 22m
Delta
Tue 3/319:50 am
LIS
- HOU
2 stops18h 52m
Delta
Deal found 2/23![Delta logo]()
$723
This Delta deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 8/21:00 pm
HOU
- LIS
2 stops23h 45m
Delta
Sat 8/295:35 am
LIS
- HOU
2 stops22h 00m
Delta
Deal found 2/23![Delta logo]()
$733
This KLM deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 7/251:15 pm
IAH
- OPO
2 stops15h 05m
KLM
Tue 8/45:00 am
OPO
- IAH
1 stop14h 15m
KLM
Deal found 2/24![KLM logo]()
$891
This Cheapflightsfares deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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.
Thu 4/1612:42 pm
HOU
- OPO
2 stops17h 03m
Iberia
Sun 4/198:20 am
OPO
- HOU
2 stops17h 31m
Iberia
Deal found 2/23![Iberia logo]()
$1,176
This United Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 6/210:52 am
IAH
- FNC
1 stop14h 13m
United Airlines
Wed 6/109:40 am
FNC
- IAH
1 stop13h 30m
United Airlines
Deal found 2/22![United Airlines logo]()
$1,100
This KLM deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 5/183:50 pm
IAH
- OPO
1 stop24h 10m
KLM
Mon 5/257:00 pm
OPO
- IAH
1 stop24h 15m
KLM
Deal found 2/21![KLM logo]()
$927
This Delta deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/2411:33 am
HOU
- LIS
2 stops18h 02m
Delta
Sat 5/235:35 am
LIS
- HOU
2 stops22h 51m
Delta
Deal found 2/23![Delta logo]()
$839
This KLM deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 stop24h 15m
KLM
Wed 5/205:00 am
OPO
- IAH
1 stop14h 15m
KLM
Deal found 2/21![KLM logo]()
$942
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated February 24, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated February 24, 2026 and is based on user searches.
This Air France deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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.
Sun 3/14:05 pm
IAH
- LIS
1 stop17h 05m
Multiple Airlines
Wed 3/115:00 am
LIS
- IAH
2 stops17h 49m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$567
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/104:30 pm
IAH
- LIS
1 stop17h 05m
Delta
Wed 3/2511:25 am
LIS
- IAH
1 stop32h 05m
Delta
Deal found 2/24![Delta logo]()
$563
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/104:30 pm
IAH
- LIS
1 stop13h 05m
Delta
Thu 3/195:30 am
LIS
- IAH
2 stops17h 58m
Delta
Deal found 2/24![Delta logo]()
$579
This KLM deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/104:30 pm
IAH
- OPO
1 stop17h 55m
KLM
Thu 3/265:00 am
OPO
- IAH
1 stop14h 30m
KLM
Deal found 2/24![KLM logo]()
$647
This KLM deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/114:30 pm
IAH
- LIS
1 stop21h 00m
Multiple Airlines
Mon 3/166:30 pm
LIS
- IAH
1 stop25h 25m
Multiple Airlines
Deal found 2/24![Multiple Airlines logo]()
$569
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/165:05 pm
IAH
- LIS
1 stop19h 25m
Delta
Tue 3/2411:25 am
LIS
- IAH
1 stop32h 05m
Delta
Deal found 2/24![Delta logo]()
$557
This oojo deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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.
Tue 3/171:16 pm
IAH
- LIS
1 stop14h 49m
British Airways
Wed 3/253:55 pm
LIS
- IAH
1 stop28h 10m
British Airways
Deal found 2/22![British Airways logo]()
$582
This KLM deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/184:30 pm
IAH
- LIS
1 stop13h 05m
KLM
Wed 4/13:35 pm
LIS
- IAH
1 stop27h 40m
KLM
Deal found 2/22![KLM logo]()
$562
This Delta deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/184:30 pm
IAH
- LIS
1 stop17h 05m
Delta
Wed 4/15:00 am
LIS
- IAH
2 stops19h 28m
Delta
Deal found 2/22![Delta logo]()
$572
This oojo deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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.
Sat 3/2110:50 pm
IAH
- LIS
1 stop30h 00m
British Airways
Sat 3/2811:05 am
LIS
- IAH
1 stop31h 15m
British Airways
Deal found 2/21![British Airways logo]()
$555
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/245:05 pm
IAH
- LIS
1 stop19h 25m
Delta
Tue 3/3111:55 am
LIS
- IAH
2 stops18h 04m
Delta
Deal found 2/21![Delta logo]()
$547
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/316:00 am
HOU
- LIS
2 stops23h 15m
Delta
Thu 4/99:50 am
LIS
- HOU
2 stops18h 52m
Delta
Deal found 2/24![Delta logo]()
$667
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 February 24, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated February 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 3/308:24 am
IAH
- OPO
3 stops33h 31m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 3/294:30 pm
IAH
- LIS
3 stops48h 05m
Multiple Airlines
Deal found 2/24![Multiple Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 3/284:30 pm
IAH
- OPO
3 stops42h 20m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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.
Fri 3/274:30 pm
IAH
- OPO
3 stops56h 35m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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.
Fri 5/296:00 am
IAH
- LIS
2 stops33h 45m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:51 pm
IAH
- LIS
2 stops44h 44m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 5/208:35 pm
IAH
- LIS
2 stops44h 00m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 3/261:42 pm
IAH
- OPO
3 stops40h 23m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 5/46:14 pm
IAH
- LIS
3 stops42h 11m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 3/3112:46 pm
IAH
- OPO
3 stops43h 14m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 6/116:00 am
IAH
- LIS
2 stops34h 35m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/37:59 pm
IAH
- LIS
3 stops42h 21m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$347
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 February 24, 2026.
Round-trip from | $540 (United Airlines) |
|---|---|
One-way from | $259 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $711 |
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 February 24, 2026.
Use the filters below to find and compare flights from Houston to Portugal that are best for you.
Fly from
Houston
Fly to
Portugal
Route
Depart
Return
Price
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Sat 4/25
6:25 am-10:45 am
2 stops22h 20m
Lisbon Humberto Delgado
Wed 5/6
5:00 am-1:15 pm
1 stop14h 15m
$541
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Fri 5/1
3:20 pm-10:55 am
1 stop13h 35m
Lisbon Humberto Delgado
Fri 5/8
3:35 pm-1:15 pm
1 stop27h 40m
$541
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Fri 4/24
3:30 pm-11:10 pm
1 stop25h 40m
Lisbon Humberto Delgado
Tue 5/5
4:30 pm-1:25 pm
1 stop26h 55m
$560
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 5/4
3:50 pm-3:25 pm
1 stop17h 35m
Porto
Mon 5/11
7:00 pm-1:15 pm
1 stop24h 15m
$599
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 4/15
10:41 am-10:40 am
2 stops17h 59m
Porto
Wed 4/22
5:00 am-1:15 pm
1 stop14h 15m
$649
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Mon 3/9
10:45 pm-9:55 pm
1 stop18h 10m
Lisbon Humberto Delgado
Mon 3/16
6:35 pm-3:05 pm
1 stop25h 30m
$670
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 5/6
6:00 am-10:55 am
2 stops22h 55m
Lisbon Humberto Delgado
Mon 5/11
5:00 am-10:26 pm
2 stops23h 26m
$670
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Wed 4/15
4:18 pm-4:00 pm
2 stops17h 42m
Porto
Wed 4/22
12:25 pm-11:47 pm
2 stops17h 22m
$671
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Wed 4/8
4:18 pm-8:00 pm
2 stops21h 42m
Porto
Wed 4/15
8:40 pm-7:51 pm
2 stops29h 11m
$682
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 3/18
5:22 pm-5:30 pm
2 stops19h 08m
Lisbon Humberto Delgado
Wed 4/1
5:00 am-10:42 pm
2 stops23h 42m
$720
Showing 1-10 of 60 results
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-LIS
HOU-FNC
HOU-OPO
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-LIS
HOU-FNC
What is the cheapest month to book a flight from Houston to Portugal?
Currently, April is the cheapest month in which you can book a flight from Houston to Portugal (average of $447). Flying from Houston to Portugal in June is currently the most expensive (average of $826). 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 February 24, 2026.
Get a feel of what it's like to fly with Delta, Air France, and United Airlines 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
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Entertainment
7.8
Food
7.2
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - 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 February 24, 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 February 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$466 | Average$868 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$971 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$891 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$946 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$590 | Average$987 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$740 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$996 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$831 | Average$1,404 | FlexibilityNo cancel fee | On-time76% |