$264+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Mar 5 — Mar 121
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 3, 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 3, 2026.
This KLM deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 11/84:05 pm
IAH
- OPO
1 stop12h 25m
KLM
Fri 11/135:00 am
OPO
- IAH
1 stop14h 30m
KLM
Deal found 2/2![KLM logo]()
$491
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/89:45 am
IAH
- OPO
2 stops17h 45m
United Airlines
Fri 11/136:00 am
OPO
- IAH
2 stops21h 10m
United Airlines
Deal found 2/2![United Airlines logo]()
$504
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/195:30 pm
IAH
- LIS
1 stop24h 20m
Lufthansa
Wed 4/14:25 pm
LIS
- IAH
1 stop27h 10m
Lufthansa
Deal found 2/2![Lufthansa logo]()
$523
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/192:45 pm
IAH
- LIS
1 stop14h 30m
United Airlines
Wed 4/15:05 am
LIS
- IAH
1 stop18h 55m
United Airlines
Deal found 2/2![United Airlines logo]()
$526
This Mytrip deal was found by Cheapflights users on 1/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/194:30 pm
IAH
- LIS
1 stop24h 20m
Multiple Airlines
Thu 11/265:00 am
LIS
- IAH
2 stops36h 09m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$529
This United Airlines deal was found by Cheapflights users on 1/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1912:10 pm
IAH
- LIS
1 stop15h 10m
United Airlines
Thu 11/265:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 1/31![United Airlines logo]()
$534
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
Thu 4/25:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/2![Delta logo]()
$537
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/225:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Mon 3/305:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/2![Delta logo]()
$538
This United Airlines deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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 4/85:20 pm
IAH
- LIS
2 stops34h 00m
United Airlines
Wed 4/155:05 am
LIS
- IAH
1 stop18h 55m
United Airlines
Deal found 2/1![United Airlines logo]()
$539
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/179:45 am
IAH
- LIS
2 stops17h 25m
United Airlines
Wed 4/15:05 am
LIS
- IAH
1 stop18h 55m
United Airlines
Deal found 2/2![United Airlines logo]()
$540
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/167:05 am
IAH
- LIS
2 stops19h 55m
Delta
Tue 3/3111:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/2![Delta logo]()
$542
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/187:00 am
IAH
- LIS
2 stops20h 40m
Delta
Mon 3/305:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/2![Delta logo]()
$543
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 3, 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 3, 2026.
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/225:05 pm
IAH
- LIS
1 stop17h 05m
Delta
Wed 4/111:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/2![Delta logo]()
$537
This United Airlines deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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 4/85:20 pm
IAH
- LIS
2 stops34h 00m
United Airlines
Wed 4/155:05 am
LIS
- IAH
1 stop18h 55m
United Airlines
Deal found 2/1![United Airlines logo]()
$539
This KLM deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/194:30 pm
IAH
- LIS
1 stop21h 15m
KLM
Tue 3/3111:55 am
LIS
- IAH
1 stop31h 20m
KLM
Deal found 2/2![KLM logo]()
$543
This Air France deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 3/313:50 pm
IAH
- OPO
1 stop17h 35m
Multiple Airlines
Thu 4/97:10 pm
OPO
- IAH
1 stop24h 05m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$648
This American Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/1012:18 pm
HOU
- LIS
2 stops15h 47m
American Airlines
Wed 3/1811:05 am
LIS
- HOU
2 stops17h 53m
American Airlines
Deal found 2/2![American Airlines logo]()
$662
This Orbitz deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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.
Sat 5/26:09 pm
IAH
- FNC
2 stops36h 31m
Iberia
Sun 5/1011:20 am
FNC
- IAH
2 stops18h 39m
Iberia
Deal found 2/3![Iberia logo]()
$680
This Gotogate deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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.
Sat 4/1112:42 pm
HOU
- OPO
2 stops25h 53m
British Airways
Sat 4/188:20 am
OPO
- HOU
2 stops21h 27m
British Airways
Deal found 2/1![British Airways logo]()
$697
This Virgin Atlantic deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 2/3![Virgin Atlantic logo]()
$837
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/225:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Thu 4/25:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/2![Delta logo]()
$537
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/217:32 pm
IAH
- LIS
1 stop33h 43m
United Airlines
Thu 4/27:25 am
LIS
- IAH
1 stop16h 35m
United Airlines
Deal found 2/2![United Airlines logo]()
$547
This KLM deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 3/43:30 pm
IAH
- OPO
1 stop13h 00m
KLM
Wed 3/115:00 am
OPO
- IAH
1 stop14h 30m
KLM
Deal found 2/3![KLM logo]()
$557
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
Mon 3/305:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/2![Delta logo]()
$538
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/147:50 pm
IAH
- LIS
1 stop33h 25m
United Airlines
Mon 3/235:00 am
LIS
- IAH
2 stops24h 30m
United Airlines
Deal found 2/2![United Airlines logo]()
$551
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
- LIS
1 stop17h 05m
Delta
Sun 3/2911:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/2![Delta logo]()
$538
This Mytrip deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 3/105:30 pm
IAH
- FNC
2 stops24h 35m
Multiple Airlines
Tue 3/1712:05 pm
FNC
- IAH
2 stops32h 05m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$657
This KLM deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 2/3![KLM logo]()
$615
This Orbitz deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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.
Sat 5/24:18 pm
HOU
- FNC
2 stops38h 22m
Iberia
Sun 5/1011:20 am
FNC
- HOU
2 stops38h 31m
Iberia
Deal found 2/3![Iberia logo]()
$686
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 stop17h 05m
Delta
Sun 3/2911:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/2![Delta logo]()
$538
This KLM deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
Multiple Airlines
Thu 3/2611:20 am
OPO
- IAH
2 stops17h 39m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$663
This KLM deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 2/3![KLM logo]()
$615
This oojo deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/104:20 pm
HOU
- LIS
2 stops24h 25m
British Airways
Tue 3/177:05 am
LIS
- HOU
2 stops37h 45m
British Airways
Deal found 2/2![British Airways logo]()
$746
This United Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 3/1111:55 am
IAH
- OPO
2 stops22h 30m
United Airlines
Fri 3/206:00 am
OPO
- IAH
2 stops38h 22m
United Airlines
Deal found 2/3![United Airlines logo]()
$631
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
- LIS
2 stops19h 55m
Delta
Tue 3/3111:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/2![Delta logo]()
$542
This Air France deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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.
Mon 5/44:59 pm
IAH
- OPO
2 stops16h 26m
Multiple Airlines
Mon 5/1111:25 am
OPO
- IAH
1 stop31h 50m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$670
This oojo deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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.
Fri 2/2712:18 pm
HOU
- LIS
2 stops17h 47m
British Airways
Mon 3/212:55 pm
LIS
- HOU
2 stops32h 56m
British Airways
Deal found 2/1![British Airways logo]()
$760
This KLM deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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 2/223:30 pm
IAH
- OPO
1 stop13h 00m
KLM
Wed 3/115:00 am
OPO
- IAH
1 stop14h 30m
KLM
Deal found 2/1![KLM logo]()
$648
This United Airlines deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/228:30 am
IAH
- OPO
2 stops19h 00m
United Airlines
Wed 3/116:00 am
OPO
- IAH
2 stops21h 28m
United Airlines
Deal found 2/1![United Airlines logo]()
$654
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/177:00 am
IAH
- LIS
2 stops20h 00m
Delta
Mon 3/3011:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/2![Delta logo]()
$543
This Iberia deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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.
Sun 5/34:18 pm
HOU
- OPO
2 stops17h 42m
Iberia
Tue 6/28:20 am
OPO
- HOU
2 stops21h 32m
Iberia
Deal found 2/1![Iberia logo]()
$805
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
- LIS
2 stops19h 55m
Delta
Thu 4/212:45 pm
LIS
- IAH
2 stops17h 14m
Delta
Deal found 2/2![Delta logo]()
$562
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated February 3, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated February 3, 2026 and is based on user searches.
This Air France deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/412:15 pm
IAH
- OPO
2 stops16h 15m
Multiple Airlines
Wed 3/114:10 pm
OPO
- IAH
1 stop27h 20m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$556
This KLM deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
- LIS
1 stop21h 20m
Multiple Airlines
Wed 3/186:30 pm
LIS
- IAH
1 stop25h 25m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$550
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/147:50 pm
IAH
- LIS
1 stop33h 25m
United Airlines
Mon 3/235:00 am
LIS
- IAH
2 stops24h 30m
United Airlines
Deal found 2/2![United Airlines logo]()
$551
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
Wed 4/111:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/2![Delta logo]()
$537
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/167:05 am
IAH
- LIS
2 stops19h 55m
Delta
Tue 3/3111:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/2![Delta logo]()
$542
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/179:45 am
IAH
- LIS
2 stops17h 25m
United Airlines
Wed 4/15:05 am
LIS
- IAH
1 stop18h 55m
United Airlines
Deal found 2/2![United Airlines logo]()
$540
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/187:00 am
IAH
- LIS
2 stops20h 40m
Delta
Mon 3/305:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/2![Delta logo]()
$543
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
Sun 3/2911:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/2![Delta logo]()
$544
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/195:30 pm
IAH
- LIS
1 stop24h 20m
Lufthansa
Wed 4/14:25 pm
LIS
- IAH
1 stop27h 10m
Lufthansa
Deal found 2/2![Lufthansa logo]()
$523
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/192:45 pm
IAH
- LIS
1 stop14h 30m
United Airlines
Wed 4/15:05 am
LIS
- IAH
1 stop18h 55m
United Airlines
Deal found 2/2![United Airlines logo]()
$526
This United Airlines deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/217:32 pm
IAH
- LIS
1 stop33h 43m
United Airlines
Thu 4/27:25 am
LIS
- IAH
1 stop16h 35m
United Airlines
Deal found 2/2![United Airlines logo]()
$547
This Delta deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/225:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Mon 3/305:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/2![Delta logo]()
$538
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 3, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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 4/147:05 am
IAH
- LIS
2 stops31h 30m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$264
This Cheapflightsfares deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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.
Tue 5/199:05 pm
IAH
- OPO
1 stop16h 25m
British Airways
Deal found 2/2![British Airways logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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
- LIS
3 stops47h 50m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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 5/26:38 pm
IAH
- LIS
2 stops55h 52m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$295
This Mytrip deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 7/2110:00 am
IAH
- LIS
3 stops31h 20m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” 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 5/17:05 am
IAH
- LIS
2 stops34h 20m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/106:00 am
IAH
- LIS
2 stops24h 40m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 5/197:05 am
IAH
- OPO
3 stops33h 45m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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 3/116:00 am
IAH
- LIS
3 stops31h 25m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$343
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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
- OPO
3 stops56h 31m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$372
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” 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
- FNC
2 stops46h 31m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$384
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” 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 3/137:19 pm
IAH
- OPO
2 stops46h 36m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$399
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 3, 2026.
Round-trip from | $523 (Kiwi.com) |
|---|---|
One-way from | $264 (Kiwi.com) |
Popular in | June |
Cheapest in | March |
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 3, 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
Sun 3/22
5:05 pm-3:10 pm
1 stop17h 05m
Lisbon Humberto Delgado
Wed 4/1
11:55 am-1:15 pm
1 stop31h 20m
$537
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Sun 3/22
5:05 pm-11:20 am
1 stop13h 15m
Lisbon Humberto Delgado
Thu 4/2
5:00 am-1:15 pm
1 stop14h 15m
$537
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Mon 3/16
5:05 pm-5:30 pm
1 stop19h 25m
Lisbon Humberto Delgado
Mon 3/30
5:00 am-1:15 pm
1 stop14h 15m
$538
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 3/17
5:05 pm-3:10 pm
1 stop17h 05m
Lisbon Humberto Delgado
Sun 3/29
11:55 am-1:15 pm
1 stop31h 20m
$538
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Mon 3/16
5:05 pm-3:10 pm
1 stop17h 05m
Lisbon Humberto Delgado
Sun 3/29
11:55 am-1:15 pm
1 stop31h 20m
$538
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 4/8
5:20 pm-9:20 am
2 stops34h 00m
Lisbon Humberto Delgado
Wed 4/15
5:05 am-6:00 pm
1 stop18h 55m
$539
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 3/17
7:05 am-8:00 am
2 stops19h 55m
Lisbon Humberto Delgado
Tue 3/31
11:55 am-1:15 pm
1 stop31h 20m
$542
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Thu 3/19
4:30 pm-6:45 pm
1 stop21h 15m
Lisbon Humberto Delgado
Tue 3/31
11:55 am-1:15 pm
1 stop31h 20m
$543
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 3/17
7:00 am-8:00 am
2 stops20h 00m
Lisbon Humberto Delgado
Mon 3/30
11:55 am-1:15 pm
1 stop31h 20m
$543
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Sat 3/21
7:32 pm-10:15 am
1 stop33h 43m
Lisbon Humberto Delgado
Thu 4/2
7:25 am-6:00 pm
1 stop16h 35m
$547
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-LIS
IAH-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-LIS
IAH-OPO
HOU-LIS
IAH-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 $463). Flying from Houston to Portugal in June is currently the most expensive (average of $824). 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 3, 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.
Overall
7.9
Comfort
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Comfort
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Comfort
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Comfort
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Comfort
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Comfort
7.9
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
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 3, 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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$466 | Average$860 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$977 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$825 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$932 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$590 | Average$980 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$740 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$955 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$831 | Average$1,404 | FlexibilityNo cancel fee | On-time76% |