$324+ 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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Mar 13 — Mar 201
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 11, 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 11, 2026.
This Delta deal was found by Cheapflights users on 2/10. 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.
Sun 4/123:50 pm
IAH
- LIS
1 stop13h 25m
Delta
Sun 4/1911:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/10![Delta logo]()
$536
This Air France deal was found by Cheapflights users on 2/9. 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.
Tue 3/245:05 pm
IAH
- LIS
1 stop17h 05m
Multiple Airlines
Mon 3/3011:55 am
LIS
- IAH
1 stop31h 20m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$537
This United Airlines deal was found by Cheapflights users on 2/9. 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 11/117:59 pm
IAH
- LIS
2 stops31h 21m
United Airlines
Thu 11/195:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 2/9![United Airlines logo]()
$538
This Trip.com deal was found by Cheapflights users on 2/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:24 pm
IAH
- LIS
1 stop17h 51m
Multiple Airlines
Wed 4/1510:20 am
LIS
- IAH
1 stop18h 29m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$539
This United Airlines deal was found by Cheapflights users on 2/10. 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 4/74:55 pm
IAH
- LIS
2 stops34h 25m
United Airlines
Tue 4/1411:25 am
LIS
- IAH
2 stops34h 24m
United Airlines
Deal found 2/10![United Airlines logo]()
$540
This Delta deal was found by Cheapflights users on 2/10. 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 4/93:20 pm
IAH
- LIS
1 stop13h 35m
Delta
Sun 4/1911:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/10![Delta logo]()
$541
This Iberia deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/73:30 pm
IAH
- LIS
1 stop20h 25m
Multiple Airlines
Tue 4/1412:30 pm
LIS
- IAH
2 stops17h 29m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$543
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Mon 3/165:30 pm
IAH
- OPO
1 stop13h 10m
Lufthansa
Tue 3/3112:05 pm
OPO
- IAH
1 stop31h 30m
Lufthansa
Deal found 2/9![Lufthansa logo]()
$543
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Tue 3/171:38 pm
IAH
- LIS
2 stops15h 37m
United Airlines
Tue 3/245:00 am
LIS
- IAH
2 stops21h 44m
United Airlines
Deal found 2/8![United Airlines logo]()
$547
This United Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:00 am
IAH
- LIS
2 stops21h 20m
United Airlines
Wed 4/157:25 am
LIS
- IAH
2 stops21h 49m
United Airlines
Deal found 2/10![United Airlines logo]()
$548
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/174:55 pm
IAH
- OPO
1 stop11h 35m
United Airlines
Thu 4/26:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines logo]()
$548
This KLM deal was found by Cheapflights users on 2/9. 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 3/185:05 pm
IAH
- OPO
1 stop12h 25m
KLM
Wed 4/17:10 pm
OPO
- IAH
1 stop24h 05m
KLM
Deal found 2/9![KLM logo]()
$550
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 11, 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 11, 2026.
This Delta deal was found by Cheapflights users on 2/10. 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 4/83:50 pm
IAH
- LIS
1 stop20h 00m
Delta
Tue 4/2111:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/10![Delta logo]()
$536
This United Airlines deal was found by Cheapflights users on 2/9. 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 4/86:00 am
IAH
- LIS
2 stops21h 20m
United Airlines
Wed 4/155:05 am
LIS
- IAH
1 stop18h 55m
United Airlines
Deal found 2/9![United Airlines logo]()
$538
This British Airways deal was found by Cheapflights users on 2/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/159:05 pm
IAH
- LIS
1 stop20h 10m
British Airways
Wed 4/227:20 am
LIS
- IAH
1 stop17h 55m
British Airways
Deal found 2/10![British Airways logo]()
$561
This KLM deal was found by Cheapflights users on 2/8. 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.
Wed 3/1812:40 pm
IAH
- OPO
2 stops16h 50m
KLM
Wed 4/111:45 am
OPO
- IAH
2 stops18h 14m
KLM
Deal found 2/8![KLM logo]()
$570
This American Airlines deal was found by Cheapflights users on 2/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:18 pm
HOU
- OPO
2 stops17h 42m
American Airlines
Wed 5/612:25 pm
OPO
- HOU
2 stops17h 22m
American Airlines
Deal found 2/9![American Airlines logo]()
$571
This Expedia deal was found by Cheapflights users on 2/9. 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 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 2/9![Iberia logo]()
$627
This Virgin Atlantic deal was found by Cheapflights users on 2/10. 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 Virgin Atlantic 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 45m
Virgin Atlantic
Mon 5/1112:45 pm
LIS
- HOU
2 stops16h 23m
Virgin Atlantic
Deal found 2/10![Virgin Atlantic logo]()
$836
This Delta deal was found by Cheapflights users on 2/10. 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.
Sun 4/123:50 pm
IAH
- LIS
1 stop20h 00m
Delta
Wed 4/2211:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/10![Delta logo]()
$536
This United Airlines deal was found by Cheapflights users on 2/10. 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 4/76:00 am
IAH
- LIS
2 stops21h 20m
United Airlines
Tue 4/1411:25 am
LIS
- IAH
2 stops34h 24m
United Airlines
Deal found 2/10![United Airlines logo]()
$540
This British Airways deal was found by Cheapflights users on 2/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/103:30 pm
IAH
- LIS
1 stop25h 40m
British Airways
Thu 4/163:00 pm
LIS
- IAH
1 stop28h 25m
British Airways
Deal found 2/10![British Airways logo]()
$561
This Mytrip deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:05 am
IAH
- FNC
3 stops45h 10m
Multiple Airlines
Fri 3/201:00 pm
FNC
- IAH
3 stops38h 26m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$1,141
This American Airlines deal was found by Cheapflights users on 2/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/214:18 pm
HOU
- OPO
2 stops17h 42m
American Airlines
Wed 5/612:25 pm
OPO
- HOU
2 stops17h 22m
American Airlines
Deal found 2/9![American Airlines logo]()
$571
This KLM deal was found by Cheapflights users on 2/9. 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.
Tue 3/104:30 pm
IAH
- OPO
1 stop13h 00m
KLM
Thu 3/2611:20 am
OPO
- IAH
1 stop32h 35m
KLM
Deal found 2/9![KLM logo]()
$576
This KAYAK deal was found by Cheapflights users on 2/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/84:47 pm
IAH
- FNC
1 stop32h 18m
Lufthansa
Wed 6/179:40 am
FNC
- IAH
1 stop17h 11m
Lufthansa
Deal found 2/8![Lufthansa logo]()
$1,159
This Delta deal was found by Cheapflights users on 2/10. 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 4/93:20 pm
IAH
- LIS
1 stop13h 35m
Delta
Mon 4/2011:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/10![Delta logo]()
$541
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Tue 3/177:25 am
IAH
- LIS
1 stop21h 50m
United Airlines
Tue 3/245:00 am
LIS
- IAH
2 stops21h 44m
United Airlines
Deal found 2/8![United Airlines logo]()
$543
This British Airways deal was found by Cheapflights users on 2/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/123:30 pm
IAH
- LIS
1 stop20h 15m
British Airways
Sat 4/254:25 pm
LIS
- IAH
1 stop27h 00m
British Airways
Deal found 2/10![British Airways logo]()
$561
This Delta deal was found by Cheapflights users on 2/10. 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 4/93:20 pm
IAH
- LIS
1 stop17h 15m
Delta
Wed 4/225:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/10![Delta logo]()
$541
This KLM deal was found by Cheapflights users on 2/8. 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.
Mon 5/43:50 pm
IAH
- OPO
1 stop17h 35m
KLM
Mon 5/114:20 pm
OPO
- IAH
1 stop26h 55m
KLM
Deal found 2/8![KLM logo]()
$599
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 3/167:50 pm
IAH
- OPO
2 stops32h 40m
United Airlines
Tue 3/316:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines logo]()
$552
This Delta deal was found by Cheapflights users on 2/10. 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 4/93:20 pm
IAH
- LIS
1 stop17h 15m
Delta
Sun 4/1911:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/10![Delta logo]()
$541
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/172:45 pm
IAH
- OPO
2 stops13h 45m
United Airlines
Thu 4/26:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines logo]()
$553
This Delta deal was found by Cheapflights users on 2/9. 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.
Wed 3/185:05 pm
IAH
- OPO
1 stop12h 25m
Delta
Mon 3/3011:25 am
OPO
- IAH
1 stop31h 50m
Delta
Deal found 2/9![Delta logo]()
$551
This KAYAK deal was found by Cheapflights users on 2/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1212:42 pm
HOU
- OPO
2 stops36h 58m
Iberia
Tue 5/1912:25 pm
OPO
- HOU
2 stops29h 47m
Iberia
Deal found 2/8![Iberia logo]()
$830
This KLM deal was found by Cheapflights users on 2/8. 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.
Tue 5/53:20 pm
IAH
- FNC
1 stop35h 55m
KLM
Sun 5/106:40 pm
FNC
- IAH
1 stop24h 35m
KLM
Deal found 2/8![KLM logo]()
$717
This Delta deal was found by Cheapflights users on 2/9. 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.
Tue 3/177:05 am
IAH
- OPO
2 stops22h 25m
Delta
Tue 3/3111:30 am
OPO
- IAH
1 stop31h 45m
Delta
Deal found 2/9![Delta logo]()
$554
This oojo deal was found by Cheapflights users on 2/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:18 pm
HOU
- LIS
2 stops17h 17m
British Airways
Tue 4/147:10 am
LIS
- HOU
2 stops18h 41m
British Airways
Deal found 2/10![British Airways logo]()
$758
This Delta deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/164:30 pm
IAH
- OPO
1 stop13h 00m
Delta
Thu 4/25:00 am
OPO
- IAH
1 stop14h 15m
Delta
Deal found 2/9![Delta logo]()
$556
This American Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:23 pm
HOU
- OPO
2 stops15h 37m
American Airlines
Wed 8/1212:25 pm
OPO
- HOU
2 stops17h 21m
American Airlines
Deal found 2/11![American Airlines logo]()
$919
This Cheapflightsfares deal was found by Cheapflights users on 2/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1812:18 pm
HOU
- OPO
2 stops18h 27m
Iberia
Wed 4/18:20 am
OPO
- HOU
2 stops17h 30m
Iberia
Deal found 2/8![Iberia logo]()
$922
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated February 11, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated February 11, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/7. 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 2/1811:55 am
IAH
- LIS
1 stop14h 15m
United Airlines
Tue 2/245:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 2/7![United Airlines logo]()
$555
This Delta deal was found by Cheapflights users on 2/10. 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 3/104:30 pm
IAH
- LIS
1 stop13h 05m
Delta
Tue 3/2411:25 am
LIS
- IAH
1 stop32h 05m
Delta
Deal found 2/10![Delta logo]()
$543
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Mon 3/165:30 pm
IAH
- OPO
1 stop13h 10m
Lufthansa
Tue 3/3112:05 pm
OPO
- IAH
1 stop31h 30m
Lufthansa
Deal found 2/9![Lufthansa logo]()
$543
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 3/167:50 pm
IAH
- OPO
2 stops32h 40m
United Airlines
Tue 3/316:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines logo]()
$552
This Delta deal was found by Cheapflights users on 2/10. 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 3/165:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Tue 3/2412:20 pm
LIS
- IAH
2 stops28h 31m
Delta
Deal found 2/10![Delta logo]()
$553
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Tue 3/171:38 pm
IAH
- LIS
2 stops15h 37m
United Airlines
Tue 3/245:00 am
LIS
- IAH
2 stops21h 44m
United Airlines
Deal found 2/8![United Airlines logo]()
$547
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/174:55 pm
IAH
- OPO
1 stop11h 35m
United Airlines
Thu 4/26:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines logo]()
$548
This Delta deal was found by Cheapflights users on 2/9. 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.
Tue 3/175:05 pm
IAH
- OPO
1 stop12h 25m
Delta
Mon 3/3011:25 am
OPO
- IAH
1 stop31h 50m
Delta
Deal found 2/9![Delta logo]()
$551
This KLM deal was found by Cheapflights users on 2/9. 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 3/185:05 pm
IAH
- OPO
1 stop12h 25m
KLM
Wed 4/17:10 pm
OPO
- IAH
1 stop24h 05m
KLM
Deal found 2/9![KLM logo]()
$550
This Delta deal was found by Cheapflights users on 2/9. 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.
Wed 3/187:05 am
IAH
- OPO
2 stops22h 25m
Delta
Wed 4/15:00 am
OPO
- IAH
1 stop14h 15m
Delta
Deal found 2/9![Delta logo]()
$554
This Air France deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/225:05 pm
IAH
- LIS
1 stop17h 05m
Multiple Airlines
Sun 4/127:45 pm
LIS
- IAH
1 stop23h 30m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$536
This Air France deal was found by Cheapflights users on 2/9. 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.
Tue 3/245:05 pm
IAH
- LIS
1 stop17h 05m
Multiple Airlines
Mon 3/3011:55 am
LIS
- IAH
1 stop31h 20m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$537
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 11, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated February 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/119:27 am
IAH
- LIS
3 stops31h 33m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/274:30 pm
IAH
- LIS
3 stops41h 45m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Mon 5/46:38 pm
IAH
- OPO
2 stops54h 12m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 5/198:31 pm
IAH
- OPO
3 stops45h 19m
Multiple Airlines
Deal found 2/7![Multiple Airlines logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:31 pm
IAH
- LIS
2 stops43h 24m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:05 am
IAH
- LIS
1 stop22h 35m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:05 am
IAH
- LIS
2 stops28h 05m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/127:19 pm
IAH
- LIS
2 stops56h 46m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/176:00 am
IAH
- LIS
3 stops26h 30m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/311:15 am
IAH
- LIS
2 stops40h 20m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/311:15 am
IAH
- OPO
3 stops40h 25m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:00 am
IAH
- OPO
3 stops32h 15m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$368
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 11, 2026.
Round-trip from | $536 (Delta) |
|---|---|
One-way from | $324 (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 11, 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
Wed 4/8
3:50 pm-5:50 pm
1 stop20h 00m
Lisbon Humberto Delgado
Tue 4/21
11:55 am-1:15 pm
1 stop31h 20m
$536
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Sun 4/12
3:50 pm-5:50 pm
1 stop20h 00m
Lisbon Humberto Delgado
Wed 4/22
11:55 am-1:15 pm
1 stop31h 20m
$536
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 4/8
6:00 am-9:20 am
2 stops21h 20m
Lisbon Humberto Delgado
Wed 4/15
5:05 am-6:00 pm
1 stop18h 55m
$538
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 4/7
6:00 am-9:20 am
2 stops21h 20m
Lisbon Humberto Delgado
Tue 4/14
11:25 am-3:49 pm
2 stops34h 24m
$540
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Thu 4/9
3:20 pm-10:55 am
1 stop13h 35m
Lisbon Humberto Delgado
Mon 4/20
11:55 am-1:15 pm
1 stop31h 20m
$541
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Thu 4/9
3:20 pm-2:35 pm
1 stop17h 15m
Lisbon Humberto Delgado
Wed 4/22
5:00 am-1:15 pm
1 stop14h 15m
$541
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Thu 4/9
3:20 pm-2:35 pm
1 stop17h 15m
Lisbon Humberto Delgado
Sun 4/19
11:55 am-1:15 pm
1 stop31h 20m
$541
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 3/17
7:25 am-10:15 am
1 stop21h 50m
Lisbon Humberto Delgado
Tue 3/24
5:00 am-9:44 pm
2 stops21h 44m
$543
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 3/18
5:05 pm-10:30 am
1 stop12h 25m
Porto
Mon 3/30
11:25 am-1:15 pm
1 stop31h 50m
$551
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 3/16
7:50 pm-9:30 am
2 stops32h 40m
Porto
Tue 3/31
6:00 am-6:00 pm
1 stop18h 00m
$552
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-LIS
IAH-OPO
HOU-OPO
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-LIS
IAH-OPO
HOU-OPO
HOU-LIS
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 $451). Flying from Houston to Portugal in June is currently the most expensive (average of $825). 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 11, 2026.
Get a feel of what it's like to fly with Delta, KLM, 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.
Food
7.2
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Overall
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
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 11, 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 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$466 | Average$860 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$972 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$825 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$935 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$590 | Average$982 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$740 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$967 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$831 | Average$1,404 | FlexibilityNo cancel fee | On-time76% |