$349+ 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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Jul 12 — Jul 191
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 12, 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 12, 2026.
This Air France deal was found by Cheapflights users on 6/9. 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.
Sun 11/84:05 pm
IAH
- OPO
1 stop12h 25m
Multiple Airlines
Mon 11/164:10 pm
OPO
- IAH
1 stop26h 55m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$709
This KLM deal was found by Cheapflights users on 6/8. 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 12/211:50 am
IAH
- OPO
2 stops15h 15m
KLM
Tue 12/89:55 am
OPO
- IAH
1 stop33h 30m
KLM
Deal found 6/8![KLM logo]()
$714
This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/211:50 am
IAH
- OPO
2 stops16h 40m
Delta
Tue 12/85:00 am
OPO
- IAH
2 stops19h 28m
Delta
Deal found 6/8![Delta logo]()
$723
This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:00 am
HOU
- OPO
2 stops21h 05m
Delta
Tue 12/85:00 am
OPO
- HOU
2 stops22h 43m
Delta
Deal found 6/8![Delta logo]()
$724
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Sun 11/89:28 am
IAH
- OPO
2 stops16h 12m
American Airlines
Fri 11/1312:25 pm
OPO
- IAH
2 stops18h 05m
American Airlines
Deal found 6/11![American Airlines logo]()
$730
This KLM deal was found by Cheapflights users on 6/8. 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.
Sun 11/84:05 pm
IAH
- OPO
1 stop12h 25m
KLM
Sat 11/144:10 pm
OPO
- IAH
1 stop27h 15m
KLM
Deal found 6/8![KLM logo]()
$759
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Sun 11/89:05 am
HOU
- OPO
2 stops16h 35m
American Airlines
Mon 11/168:40 pm
OPO
- HOU
2 stops19h 00m
American Airlines
Deal found 6/12![American Airlines logo]()
$760
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Sun 11/84:45 pm
IAH
- OPO
2 stops17h 15m
American Airlines
Mon 11/168:40 pm
OPO
- IAH
2 stops20h 44m
American Airlines
Deal found 6/12![American Airlines logo]()
$760
This Delta deal was found by Cheapflights users on 6/9. 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.
Sun 11/811:50 am
IAH
- OPO
2 stops16h 40m
Delta
Sat 11/145:00 am
OPO
- IAH
1 stop14h 05m
Delta
Deal found 6/9![Delta logo]()
$763
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Mon 10/127:50 pm
IAH
- OPO
2 stops29h 10m
United Airlines
Wed 10/2111:20 am
OPO
- IAH
2 stops30h 21m
United Airlines
Deal found 6/7![United Airlines logo]()
$766
This KLM deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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
Mon 11/1611:15 am
OPO
- IAH
1 stop31h 50m
KLM
Deal found 6/12![KLM logo]()
$768
This Air France deal was found by Cheapflights users on 6/9. 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.
Sun 11/81:15 pm
IAH
- OPO
2 stops15h 15m
Multiple Airlines
Sun 11/155:00 am
OPO
- IAH
2 stops17h 35m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$773
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 12, 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 12, 2026.
This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:00 am
HOU
- OPO
2 stops21h 05m
Delta
Tue 12/85:00 am
OPO
- HOU
2 stops22h 43m
Delta
Deal found 6/8![Delta logo]()
$724
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Sun 11/89:05 am
HOU
- OPO
2 stops16h 35m
American Airlines
Mon 11/168:40 pm
OPO
- HOU
2 stops19h 00m
American Airlines
Deal found 6/12![American Airlines logo]()
$760
This United Airlines deal was found by Cheapflights users on 6/7. 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.
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 6/7![United Airlines logo]()
$811
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/11:15 pm
IAH
- OPO
2 stops13h 50m
KLM
Sat 11/711:15 am
OPO
- IAH
1 stop32h 10m
KLM
Deal found 6/10![KLM logo]()
$824
This British Airways deal was found by Cheapflights users on 6/7. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/279:10 pm
IAH
- FNC
1 stop32h 10m
British Airways
Wed 8/1212:10 pm
FNC
- IAH
1 stop31h 15m
British Airways
Deal found 6/7![British Airways logo]()
$1,020
This United deal was found by Cheapflights users on 6/11. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:15 am
IAH
- LIS
2 stops23h 50m
Multiple Airlines
Mon 10/511:25 am
LIS
- IAH
2 stops34h 12m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$1,040
This Iberia deal was found by Cheapflights users on 6/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:14 pm
HOU
- LIS
2 stops15h 51m
Iberia
Sun 8/2312:30 pm
LIS
- HOU
2 stops17h 26m
Iberia
Deal found 6/11![Iberia logo]()
$1,040
This Finnair deal was found by Cheapflights users on 6/11. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/232:04 pm
IAH
- LIS
2 stops27h 21m
Finnair
Thu 7/236:35 am
LIS
- IAH
2 stops23h 16m
Finnair
Deal found 6/11![Finnair logo]()
$1,386
This TAP AIR PORTUGAL deal was found by Cheapflights users on 6/7. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/911:44 am
IAH
- FNC
2 stops19h 46m
TAP AIR PORTUGAL
Fri 11/133:05 pm
FNC
- IAH
2 stops25h 03m
TAP AIR PORTUGAL
Deal found 6/7![TAP AIR PORTUGAL logo]()
$1,422
This Delta deal was found by Cheapflights users on 6/9. 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.
Sat 11/74:05 pm
IAH
- OPO
1 stop12h 25m
Delta
Sat 11/145:00 am
OPO
- IAH
1 stop14h 05m
Delta
Deal found 6/9![Delta logo]()
$809
This United Airlines deal was found by Cheapflights users on 6/11. 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 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 stops30h 26m
United Airlines
Deal found 6/11![United Airlines logo]()
$864
This KLM deal was found by Cheapflights users on 6/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:48 pm
IAH
- OPO
2 stops15h 42m
KLM
Tue 8/184:20 pm
OPO
- IAH
1 stop27h 00m
KLM
Deal found 6/11![KLM logo]()
$872
This Delta deal was found by Cheapflights users on 6/11. 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 Delta 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
Delta
Sat 11/1411:15 am
OPO
- IAH
1 stop32h 10m
Delta
Deal found 6/11![Delta logo]()
$818
This Delta deal was found by Cheapflights users on 6/10. 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 11/811:50 am
IAH
- OPO
2 stops16h 40m
Delta
Sun 11/155:00 am
OPO
- IAH
1 stop14h 25m
Delta
Deal found 6/10![Delta logo]()
$823
This United Airlines deal was found by Cheapflights users on 6/8. 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 9/157:00 am
IAH
- OPO
2 stops18h 00m
United Airlines
Thu 9/246:00 am
OPO
- IAH
2 stops19h 02m
United Airlines
Deal found 6/8![United Airlines logo]()
$907
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/83:25 pm
IAH
- OPO
1 stop18h 05m
KLM
Wed 7/157:10 pm
OPO
- IAH
1 stop24h 10m
KLM
Deal found 6/10![KLM logo]()
$921
This British Airways deal was found by Cheapflights users on 6/8. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/63:30 pm
IAH
- FNC
1 stop21h 05m
British Airways
Mon 7/206:55 pm
FNC
- IAH
1 stop24h 30m
British Airways
Deal found 6/8![British Airways logo]()
$1,072
This United Airlines deal was found by Cheapflights users on 6/7. 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 9/210:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Wed 9/166:00 am
OPO
- IAH
1 stop17h 50m
United Airlines
Deal found 6/7![United Airlines logo]()
$915
This United deal was found by Cheapflights users on 6/8. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/234:10 pm
IAH
- FNC
1 stop15h 50m
Multiple Airlines
Sat 11/2811:50 am
FNC
- IAH
2 stops56h 10m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$1,176
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:26 pm
HOU
- OPO
2 stops19h 39m
Delta
Fri 10/25:00 am
OPO
- HOU
2 stops23h 35m
Delta
Deal found 6/11![Delta logo]()
$885
This Orbitz deal was found by Cheapflights users on 6/7. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:14 pm
HOU
- OPO
2 stops19h 46m
Iberia
Wed 9/168:40 pm
OPO
- HOU
2 stops29h 08m
Iberia
Deal found 6/7![Iberia logo]()
$1,210
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/133:25 pm
IAH
- FNC
1 stop36h 10m
KLM
Mon 7/2710:00 am
FNC
- IAH
1 stop33h 20m
KLM
Deal found 6/10![KLM logo]()
$1,056
This British Airways deal was found by Cheapflights users on 6/10. 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.
Mon 7/133:30 pm
IAH
- FNC
1 stop21h 05m
British Airways
Mon 7/276:55 pm
FNC
- IAH
2 stops33h 54m
British Airways
Deal found 6/10![British Airways logo]()
$1,164
This Delta deal was found by Cheapflights users on 6/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:17 pm
HOU
- OPO
2 stops22h 48m
Delta
Tue 7/215:00 am
OPO
- HOU
2 stops22h 51m
Delta
Deal found 6/7![Delta logo]()
$931
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Thu 7/236:01 am
IAH
- LIS
1 stop20h 19m
United Airlines
Tue 8/46:45 am
LIS
- IAH
2 stops21h 14m
United Airlines
Deal found 6/9![United Airlines logo]()
$1,038
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:20 pm
HOU
- OPO
2 stops23h 10m
Delta
Tue 8/185:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 6/11![Delta logo]()
$931
This British Airways deal was found by Cheapflights users on 6/8. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/612:46 pm
HOU
- FNC
2 stops23h 49m
British Airways
Mon 7/206:55 pm
FNC
- HOU
2 stops31h 02m
British Airways
Deal found 6/8![British Airways logo]()
$1,249
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/273:25 pm
IAH
- FNC
3 stops24h 25m
Multiple Airlines
Wed 8/125:50 am
FNC
- IAH
2 stops22h 11m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$1,417
This Delta deal was found by Cheapflights users on 6/10. 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 7/83:25 pm
IAH
- OPO
1 stop18h 05m
Delta
Wed 7/155:00 am
OPO
- IAH
2 stops19h 52m
Delta
Deal found 6/10![Delta logo]()
$931
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sat 7/46:18 pm
IAH
- LIS
1 stop32h 02m
United Airlines
Tue 7/2810:25 am
LIS
- IAH
1 stop19h 18m
United Airlines
Deal found 6/8![United Airlines logo]()
$1,239
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated June 12, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated June 12, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/65:05 pm
IAH
- OPO
1 stop23h 10m
Delta
Fri 7/3112:45 pm
OPO
- IAH
2 stops28h 26m
Delta
Deal found 6/8![Delta logo]()
$939
This United Airlines deal was found by Cheapflights users on 6/9. 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 7/76:01 am
IAH
- OPO
1 stop18h 14m
United Airlines
Wed 7/2911:20 am
OPO
- IAH
1 stop14h 18m
United Airlines
Deal found 6/9![United Airlines logo]()
$927
This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/72:10 pm
IAH
- OPO
2 stops19h 15m
Delta
Tue 7/285:00 am
OPO
- IAH
2 stops22h 44m
Delta
Deal found 6/8![Delta logo]()
$931
This Air Canada deal was found by Cheapflights users on 6/9. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/711:45 am
IAH
- OPO
2 stops37h 15m
Air Canada
Wed 7/2911:20 am
OPO
- IAH
1 stop14h 18m
Air Canada
Deal found 6/9![Air Canada logo]()
$934
This Delta deal was found by Cheapflights users on 6/9. 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 7/75:35 pm
HOU
- OPO
2 stops15h 50m
Delta
Wed 7/295:55 am
OPO
- HOU
2 stops21h 56m
Delta
Deal found 6/9![Delta logo]()
$938
This Air Canada deal was found by Cheapflights users on 6/9. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/711:45 am
IAH
- OPO
2 stops37h 15m
Air Canada
Thu 7/3011:50 am
OPO
- IAH
2 stops27h 02m
Air Canada
Deal found 6/9![Air Canada logo]()
$942
This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:35 pm
HOU
- OPO
2 stops15h 50m
Delta
Thu 7/301:25 pm
OPO
- HOU
2 stops26h 20m
Delta
Deal found 6/8![Delta logo]()
$943
This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:20 pm
IAH
- OPO
2 stops16h 05m
Delta
Fri 7/3112:45 pm
OPO
- IAH
2 stops25h 52m
Delta
Deal found 6/8![Delta logo]()
$943
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/83:25 pm
IAH
- OPO
1 stop18h 05m
KLM
Wed 7/157:10 pm
OPO
- IAH
1 stop24h 10m
KLM
Deal found 6/10![KLM logo]()
$921
This Air France deal was found by Cheapflights users on 6/10. 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.
Wed 7/83:25 pm
IAH
- OPO
1 stop18h 05m
Multiple Airlines
Mon 7/209:25 am
OPO
- IAH
1 stop35h 25m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$941
This Delta deal was found by Cheapflights users on 6/9. 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 7/146:00 am
HOU
- OPO
2 stops22h 30m
Delta
Tue 7/215:00 am
OPO
- HOU
2 stops22h 51m
Delta
Deal found 6/9![Delta logo]()
$931
This United Airlines deal was found by Cheapflights users on 6/7. 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 7/226:10 am
IAH
- OPO
2 stops18h 50m
United Airlines
Wed 7/296:00 am
OPO
- IAH
2 stops24h 34m
United Airlines
Deal found 6/7![United Airlines logo]()
$932
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 12, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 6/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:10 pm
IAH
- LIS
1 stop14h 45m
British Airways
Deal found 6/9![British Airways logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Tue 10/135:09 pm
IAH
- LIS
3 stops47h 06m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$356
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:45 pm
IAH
- LIS
2 stops34h 35m
Air Canada
Deal found 6/9![Air Canada logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 7/147:23 pm
IAH
- LIS
3 stops44h 22m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:44 pm
IAH
- LIS
3 stops42h 36m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/137:23 pm
IAH
- LIS
3 stops45h 57m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$402
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/87:23 pm
IAH
- FNC
2 stops38h 02m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$407
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Thu 10/154:45 pm
IAH
- LIS
2 stops34h 35m
Air Canada
Deal found 6/11![Air Canada logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Sun 7/191:16 pm
IAH
- LIS
3 stops50h 49m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$410
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Wed 10/710:00 am
IAH
- LIS
1 stop17h 20m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$412
This Delta deal was found by Cheapflights users on 6/10. 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 10/710:05 am
HOU
- LIS
2 stops16h 45m
Delta
Deal found 6/10![Delta logo]()
$431
This Kiwi.com deal was found by Cheapflights users on 6/7. 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.
Fri 7/310:08 pm
IAH
- FNC
3 stops44h 47m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$452
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 12, 2026.
Round-trip from | $709 (Air France) |
|---|---|
One-way from | $349 (Cheapflightsfares) |
Popular in | June |
Cheapest in | April |
Average price | $1,366 |
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 12, 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
HOU - OPO
HOUOPO
Houston Hobby
Wed 12/2
6:00 am-9:05 am
2 stops21h 05m
Porto
Tue 12/8
5:00 am-9:43 pm
2 stops22h 43m
$724
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Sun 11/8
9:05 am-7:40 am
2 stops16h 35m
Porto
Mon 11/16
8:40 pm-9:40 am
2 stops19h 00m
$760
Quickest round-trip
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sat 11/7
4:05 pm-10:30 am
1 stop12h 25m
Porto
Sat 11/14
5:00 am-1:05 pm
1 stop14h 05m
$809
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
10:00 am-7:10 am
1 stop15h 10m
Porto
Wed 10/21
11:20 am-11:41 am
2 stops30h 21m
$811
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sun 11/8
4:05 pm-10:30 am
1 stop12h 25m
Porto
Sat 11/14
11:15 am-1:25 pm
1 stop32h 10m
$818
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sun 11/8
11:50 am-10:30 am
2 stops16h 40m
Porto
Sun 11/15
5:00 am-1:25 pm
1 stop14h 25m
$823
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sun 11/1
1:15 pm-9:05 am
2 stops13h 50m
Porto
Sat 11/7
11:15 am-1:25 pm
1 stop32h 10m
$824
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
10:00 am-7:10 am
1 stop15h 10m
Porto
Tue 10/20
11:15 am-11:41 am
2 stops30h 26m
$864
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 8/3
5:48 pm-3:30 pm
2 stops15h 42m
Porto
Tue 8/18
4:20 pm-1:20 pm
1 stop27h 00m
$872
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Sun 9/20
5:26 pm-7:05 pm
2 stops19h 39m
Porto
Fri 10/2
5:00 am-10:35 pm
2 stops23h 35m
$885
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Houston to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Houston with our price prediction graph.
IAH-LIS
HOU-LIS
HOU-FNC
IAH-OPO
IAH-FNC
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston to Portugal
HO1-PT0
IAH-LIS
HOU-LIS
HOU-FNC
IAH-OPO
What is the cheapest month to book a flight from Houston to Portugal?
Currently, March is the cheapest month in which you can book a flight from Houston to Portugal (average of $395). Flying from Houston to Portugal in June is currently the most expensive (average of $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 69 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 12, 2026.
Get a feel of what it's like to fly with Delta,KLM, andAir France from Houston to Portugal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from Houston to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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 12, 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 June 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$395 | Average$1,016 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$466 | Average$868 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$940 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$768 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$874 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$581 | Average$1,005 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$739 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$896 | FlexibilityNo cancel fee | On-time67% |