$303+ Cheap flights from Houston to Portugal
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Jul 29 — Aug 51
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Houston to Portugal
Cheapest
Best
Last-minute
One-way
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 June 29, 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 June 29, 2026.
This Gotogate deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 11/211:50 am
IAH
- LIS
1 stop16h 50m
Multiple Airlines
Fri 11/275:00 am
LIS
- IAH
1 stop15h 00m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$706
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/71:35 pm
IAH
- OPO
1 stop13h 55m
United Airlines
Thu 12/106:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 6/24![United Airlines logo]()
$707
This KLM deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 30m
KLM
Fri 11/135:00 am
OPO
- IAH
1 stop14h 05m
KLM
Deal found 6/25![KLM logo]()
$708
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 11/88:15 am
IAH
- OPO
2 stops20h 20m
Delta
Fri 11/135:00 am
OPO
- IAH
1 stop14h 05m
Delta
Deal found 6/25![Delta logo]()
$712
This Gotogate deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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.
Tue 11/1711:50 am
IAH
- LIS
2 stops15h 30m
Multiple Airlines
Tue 11/245:00 am
LIS
- IAH
1 stop15h 00m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$713
This Air France deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/74:05 pm
IAH
- OPO
1 stop12h 30m
Multiple Airlines
Thu 12/105:00 am
OPO
- IAH
2 stops17h 35m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$718
This United deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:34 pm
IAH
- OPO
2 stops30h 56m
Multiple Airlines
Fri 11/136:00 am
OPO
- IAH
2 stops25h 01m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$721
This United Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:50 am
IAH
- LIS
1 stop13h 05m
United Airlines
Thu 11/195:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 6/26![United Airlines logo]()
$722
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 11/810:05 am
HOU
- OPO
2 stops17h 00m
Delta
Fri 11/135:00 am
OPO
- HOU
2 stops22h 43m
Delta
Deal found 6/25![Delta logo]()
$723
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 11/107:30 am
IAH
- LIS
1 stop18h 40m
United Airlines
Wed 11/185:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 6/25![United Airlines logo]()
$723
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am
IAH
- LIS
1 stop19h 00m
Delta
Wed 12/211:30 am
LIS
- IAH
1 stop31h 55m
Delta
Deal found 6/27![Delta logo]()
$725
This FlightHub deal was found by Cheapflights users on 6/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:10 pm
IAH
- LIS
2 stops32h 45m
Multiple Airlines
Wed 11/185:00 am
LIS
- IAH
1 stop15h 00m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$727
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 June 29, 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 June 29, 2026.
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/79:45 am
IAH
- OPO
2 stops17h 45m
United Airlines
Thu 12/106:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 6/24![United Airlines logo]()
$711
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:00 pm
HOU
- LIS
2 stops16h 20m
Delta
Wed 11/185:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 6/26![Delta logo]()
$738
This KLM deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:42 am
IAH
- LIS
2 stops16h 18m
KLM
Wed 10/283:35 pm
LIS
- IAH
1 stop27h 50m
KLM
Deal found 6/27![KLM logo]()
$760
This Air France deal was found by Cheapflights users on 6/24. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1012:12 pm
IAH
- OPO
2 stops16h 18m
Multiple Airlines
Mon 8/248:00 pm
OPO
- IAH
1 stop23h 20m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$871
This American Airlines deal was found by Cheapflights users on 6/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:14 pm
HOU
- OPO
2 stops15h 46m
American Airlines
Tue 9/228:20 am
OPO
- HOU
2 stops17h 28m
American Airlines
Deal found 6/24![American Airlines logo]()
$1,039
This British Airways deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/98:14 pm
HOU
- OPO
2 stops18h 21m
British Airways
Tue 8/258:55 pm
OPO
- HOU
2 stops26h 49m
British Airways
Deal found 6/27![British Airways logo]()
$1,095
This United Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:30 am
IAH
- LIS
1 stop18h 40m
United Airlines
Wed 11/185:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 6/26![United Airlines logo]()
$723
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:00 am
HOU
- LIS
2 stops23h 20m
Delta
Thu 11/195:00 am
LIS
- HOU
2 stops17h 30m
Delta
Deal found 6/28![Delta logo]()
$739
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:00 am
IAH
- LIS
2 stops18h 55m
United Airlines
Thu 11/195:00 am
LIS
- IAH
1 stop15h 00m
United Airlines
Deal found 6/27![United Airlines logo]()
$726
This KLM deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:55 pm
IAH
- OPO
1 stop17h 30m
KLM
Wed 10/2111:45 am
OPO
- IAH
1 stop31h 30m
KLM
Deal found 6/28![KLM logo]()
$814
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1810:05 am
HOU
- LIS
2 stops15h 55m
Delta
Tue 12/111:30 am
LIS
- HOU
2 stops27h 56m
Delta
Deal found 6/26![Delta logo]()
$770
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:00 am
IAH
- LIS
1 stop17h 20m
United Airlines
Fri 10/2311:25 am
LIS
- IAH
1 stop14h 27m
United Airlines
Deal found 6/27![United Airlines logo]()
$768
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:57 am
IAH
- LIS
2 stops17h 58m
Delta
Wed 10/285:00 am
LIS
- IAH
2 stops22h 15m
Delta
Deal found 6/28![Delta logo]()
$773
This KLM deal was found by Cheapflights users on 6/24. 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.
Mon 8/103:55 pm
IAH
- OPO
1 stop17h 30m
KLM
Mon 8/244:20 pm
OPO
- IAH
1 stop27h 00m
KLM
Deal found 6/24![KLM logo]()
$866
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/69:45 pm
IAH
- LIS
2 stops30h 55m
United Airlines
Thu 12/105:00 am
LIS
- IAH
1 stop15h 00m
United Airlines
Deal found 6/28![United Airlines logo]()
$769
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:05 am
HOU
- LIS
2 stops15h 55m
Delta
Wed 10/2810:00 am
LIS
- HOU
2 stops16h 43m
Delta
Deal found 6/25![Delta logo]()
$780
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/67:30 am
IAH
- LIS
2 stops18h 40m
United Airlines
Sun 12/135:00 am
LIS
- IAH
1 stop15h 00m
United Airlines
Deal found 6/24![United Airlines logo]()
$800
This Delta deal was found by Cheapflights users on 6/24. 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 10/125:35 pm
HOU
- LIS
2 stops19h 10m
Delta
Thu 10/225:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 6/24![Delta logo]()
$804
This Mytrip deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:20 am
IAH
- FNC
3 stops24h 55m
Multiple Airlines
Sat 10/109:00 am
FNC
- IAH
3 stops43h 40m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$1,249
This KLM deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/84:59 pm
IAH
- FNC
2 stops34h 16m
KLM
Sat 9/197:30 pm
FNC
- IAH
1 stop23h 45m
KLM
Deal found 6/26![KLM logo]()
$1,035
This United Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:00 am
IAH
- OPO
1 stop15h 10m
United Airlines
Tue 10/2011:15 am
OPO
- IAH
2 stops32h 13m
United Airlines
Deal found 6/26![United Airlines logo]()
$810
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 12/611:30 am
IAH
- LIS
2 stops17h 50m
Delta
Sun 12/135:00 am
LIS
- IAH
2 stops19h 59m
Delta
Deal found 6/25![Delta logo]()
$811
This Mytrip deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:00 pm
IAH
- FNC
3 stops29h 00m
Multiple Airlines
Sat 9/194:05 am
FNC
- IAH
2 stops23h 47m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$1,252
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:00 am
IAH
- OPO
1 stop15h 10m
United Airlines
Wed 10/2111:20 am
OPO
- IAH
2 stops30h 21m
United Airlines
Deal found 6/29![United Airlines logo]()
$810
This KLM deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/293:25 pm
IAH
- FNC
1 stop36h 05m
KLM
Sat 9/57:30 pm
FNC
- IAH
1 stop23h 50m
KLM
Deal found 6/28![KLM logo]()
$1,101
This Delta deal was found by Cheapflights users on 6/24. 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.
Sun 8/97:00 am
IAH
- OPO
2 stops21h 25m
Delta
Tue 8/2511:35 am
OPO
- IAH
1 stop31h 45m
Delta
Deal found 6/24![Delta logo]()
$859
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:45 am
IAH
- OPO
2 stops17h 25m
United Airlines
Sat 11/76:00 am
OPO
- IAH
2 stops21h 35m
United Airlines
Deal found 6/25![United Airlines logo]()
$820
This KLM deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/293:25 pm
IAH
- FNC
1 stop36h 05m
KLM
Sun 9/66:40 pm
FNC
- IAH
1 stop24h 35m
KLM
Deal found 6/28![KLM logo]()
$1,101
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:00 am
HOU
- OPO
2 stops20h 30m
Delta
Tue 8/255:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 6/28![Delta logo]()
$880
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/208:18 pm
IAH
- OPO
1 stop31h 12m
United Airlines
Fri 11/276:00 am
OPO
- IAH
2 stops21h 35m
United Airlines
Deal found 6/25![United Airlines logo]()
$840
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated June 29, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated June 29, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/512:00 pm
IAH
- OPO
1 stop12h 55m
United Airlines
Tue 7/1412:15 pm
OPO
- IAH
2 stops31h 23m
United Airlines
Deal found 6/24![United Airlines logo]()
$1,115
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1510:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Thu 7/2311:50 am
OPO
- IAH
2 stops31h 16m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,113
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:05 pm
IAH
- LIS
1 stop15h 50m
Delta
Wed 8/55:35 am
LIS
- IAH
1 stop14h 05m
Delta
Deal found 6/25![Delta logo]()
$973
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:05 pm
IAH
- LIS
1 stop15h 50m
Delta
Thu 8/610:00 am
LIS
- IAH
1 stop17h 44m
Delta
Deal found 6/25![Delta logo]()
$986
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2810:00 am
IAH
- LIS
1 stop17h 20m
United Airlines
Tue 8/410:25 am
LIS
- IAH
2 stops28h 07m
United Airlines
Deal found 6/28![United Airlines logo]()
$990
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:05 pm
IAH
- LIS
1 stop15h 50m
Delta
Tue 8/412:45 pm
LIS
- IAH
2 stops17h 07m
Delta
Deal found 6/25![Delta logo]()
$1,073
This Cheapflightsfares deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:10 pm
IAH
- LIS
1 stop14h 45m
British Airways
Tue 8/46:45 pm
LIS
- IAH
1 stop24h 40m
British Airways
Deal found 6/28![British Airways logo]()
$1,079
This Kiwi.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/288:37 pm
IAH
- LIS
1 stop27h 08m
Multiple Airlines
Thu 8/66:10 am
LIS
- IAH
2 stops35h 00m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$1,080
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/2911:32 am
IAH
- LIS
2 stops21h 23m
Delta
Wed 8/55:35 am
LIS
- IAH
1 stop14h 05m
Delta
Deal found 6/25![Delta logo]()
$977
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/305:05 pm
IAH
- LIS
1 stop15h 50m
Delta
Wed 8/55:35 am
LIS
- IAH
1 stop14h 05m
Delta
Deal found 6/25![Delta logo]()
$1,033
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/305:05 pm
IAH
- LIS
1 stop15h 50m
Delta
Thu 8/610:00 am
LIS
- IAH
1 stop17h 44m
Delta
Deal found 6/25![Delta logo]()
$1,046
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3110:00 am
IAH
- LIS
1 stop17h 20m
United Airlines
Tue 8/410:25 am
LIS
- IAH
2 stops28h 07m
United Airlines
Deal found 6/27![United Airlines logo]()
$1,050
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 June 29, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated June 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 10/118:44 pm
IAH
- OPO
3 stops41h 21m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/257:23 pm
IAH
- OPO
3 stops54h 07m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:49 am
IAH
- OPO
2 stops38h 31m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 6/24. 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.
Mon 8/177:23 pm
IAH
- LIS
2 stops45h 07m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 9/294:39 pm
IAH
- OPO
2 stops48h 16m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:53 pm
IAH
- OPO
2 stops53h 37m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:35 am
IAH
- LIS
3 stops39h 00m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:23 pm
IAH
- LIS
3 stops45h 12m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:00 am
IAH
- OPO
3 stops42h 30m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:42 pm
IAH
- LIS
2 stops40h 43m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:00 am
IAH
- LIS
3 stops55h 00m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$367
This Kiwi.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 10/1010:15 pm
IAH
- OPO
3 stops40h 25m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$372
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 June 29, 2026.
Round-trip from | $706 (Gotogate) |
|---|---|
One-way from | $303 (Kiwi.com) |
Popular in | June |
Cheapest in | April |
Average price | $1,361 |
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 June 29, 2026.
Use the filters below to find and compare flights from Houston to Portugal that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 12/7
9:45 am-9:30 am
2 stops17h 45m
Porto
Thu 12/10
6:00 am-6:15 pm
1 stop18h 15m
$711
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 11/10
7:30 am-8:10 am
1 stop18h 40m
Lisbon Humberto Delgado
Wed 11/18
5:00 am-6:15 pm
1 stop19h 15m
$723
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 11/11
6:00 am-6:55 am
2 stops18h 55m
Lisbon Humberto Delgado
Thu 11/19
5:00 am-2:00 pm
1 stop15h 00m
$726
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Tue 11/10
1:00 pm-11:20 am
2 stops16h 20m
Lisbon Humberto Delgado
Wed 11/18
5:00 am-9:43 pm
2 stops22h 43m
$738
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 11/11
6:00 am-11:20 am
2 stops23h 20m
Lisbon Humberto Delgado
Thu 11/19
5:00 am-4:30 pm
2 stops17h 30m
$739
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 10/21
9:42 am-8:00 am
2 stops16h 18m
Lisbon Humberto Delgado
Wed 10/28
3:35 pm-2:25 pm
1 stop27h 50m
$760
Quickest round-trip
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 10/13
10:00 am-9:20 am
1 stop17h 20m
Lisbon Humberto Delgado
Fri 10/23
11:25 am-7:52 pm
1 stop14h 27m
$768
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Sun 12/6
9:45 pm-10:40 am
2 stops30h 55m
Lisbon Humberto Delgado
Thu 12/10
5:00 am-2:00 pm
1 stop15h 00m
$769
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 11/18
10:05 am-8:00 am
2 stops15h 55m
Lisbon Humberto Delgado
Tue 12/1
11:30 am-9:26 am
2 stops27h 56m
$770
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 10/21
10:57 am-10:55 am
2 stops17h 58m
Lisbon Humberto Delgado
Wed 10/28
5:00 am-10:15 pm
2 stops22h 15m
$773
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Houston to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Houston with our price prediction graph.
IAH-OPO
IAH-LIS
HOU-LIS
HOU-OPO
IAH-FNC
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston to Portugal
HO1-PT0
IAH-OPO
IAH-LIS
HOU-LIS
HOU-OPO
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 $404). Flying from Houston to Portugal in June is currently the most expensive (average of $1,089). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How far ahead should I book a flight from Houston to Portugal?
The best time to book flights from Houston to Portugal is 57 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Reviews of airlines servicing Portugal
Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated June 29, 2026.
Get a feel of what it's like to fly with KLM,Delta, andAir France from Houston to Portugal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.8
Boarding
7.8
Crew
8.4
Comfort
7.7
Entertainment
7.2
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Overall
7.8
Boarding
7.8
Crew
8.4
Comfort
7.7
Entertainment
7.2
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Overall
7.8
Boarding
7.8
Crew
8.4
Comfort
7.7
Entertainment
7.2
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Overall
7.8
Boarding
7.8
Crew
8.4
Comfort
7.7
Entertainment
7.2
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Overall
7.8
Boarding
7.8
Crew
8.4
Comfort
7.7
Entertainment
7.2
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Overall
7.8
Boarding
7.8
Crew
8.4
Comfort
7.7
Entertainment
7.2
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - 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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Top regions
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 June 29, 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 7 airlines flying from Houston to Portugal
Discover the top 7 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 June 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$466 | Average$868 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$940 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$782 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$834 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$581 | Average$1,034 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$732 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$870 | FlexibilityNo cancel fee | On-time67% |