$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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Aug 6 — Aug 131
Round-trip
1 adult, Economy
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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 July 7, 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 July 7, 2026.
This United deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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.
Tue 11/109:35 am
IAH
- OPO
1 stop17h 55m
Multiple Airlines
Fri 11/206:00 am
OPO
- IAH
1 stop18h 15m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$707
This KLM deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 11/44:05 pm
IAH
- OPO
1 stop12h 30m
KLM
Thu 11/124:10 pm
OPO
- IAH
1 stop26h 55m
KLM
Deal found 7/5![KLM logo]()
$708
This United Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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 11/107:20 am
IAH
- OPO
2 stops20h 10m
United Airlines
Fri 11/206:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 7/6![United Airlines logo]()
$711
This Gotogate deal was found by Cheapflights users on 7/3. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/33:30 pm
IAH
- LIS
1 stop11h 50m
Multiple Airlines
Tue 11/105:00 am
LIS
- IAH
1 stop15h 00m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$713
This Delta deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 11/411:20 am
IAH
- OPO
2 stops17h 15m
Delta
Thu 11/125:00 am
OPO
- IAH
1 stop14h 25m
Delta
Deal found 7/5![Delta logo]()
$713
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 11/48:25 am
IAH
- OPO
2 stops19h 05m
United Airlines
Thu 11/126:00 am
OPO
- IAH
2 stops21h 29m
United Airlines
Deal found 7/5![United Airlines logo]()
$721
This Delta deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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 11/106:00 am
HOU
- OPO
2 stops22h 35m
Delta
Fri 11/205:00 am
OPO
- HOU
2 stops22h 43m
Delta
Deal found 7/6![Delta logo]()
$722
This United Airlines deal was found by Cheapflights users on 7/3. 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 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 7/3![United Airlines logo]()
$722
This United Airlines deal was found by Cheapflights users on 7/3. 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.
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 7/3![United Airlines logo]()
$723
This KLM deal was found by Cheapflights users on 7/3. 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 11/1112:55 pm
IAH
- LIS
1 stop13h 05m
KLM
Tue 11/173:35 pm
LIS
- IAH
1 stop27h 50m
KLM
Deal found 7/3![KLM logo]()
$725
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 11/1110:55 am
IAH
- OPO
1 stop16h 35m
United Airlines
Fri 11/1312:35 pm
OPO
- IAH
1 stop16h 08m
United Airlines
Deal found 7/5![United Airlines logo]()
$726
This CheapOair deal was found by Cheapflights users on 7/3. 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 CheapOair 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
Multiple Airlines
Tue 11/1712:35 pm
LIS
- IAH
2 stops39h 04m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$728
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 July 7, 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 July 7, 2026.
This United deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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.
Tue 11/109:35 am
IAH
- OPO
1 stop17h 55m
Multiple Airlines
Fri 11/206:00 am
OPO
- IAH
1 stop18h 15m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$707
This United Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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 11/107:20 am
IAH
- OPO
2 stops20h 10m
United Airlines
Fri 11/206:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 7/6![United Airlines logo]()
$711
This Delta deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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 11/106:00 am
HOU
- OPO
2 stops22h 35m
Delta
Fri 11/205:00 am
OPO
- HOU
2 stops22h 43m
Delta
Deal found 7/6![Delta logo]()
$722
This KLM deal was found by Cheapflights users on 7/3. 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 11/1112:55 pm
IAH
- LIS
1 stop13h 05m
KLM
Tue 11/173:35 pm
LIS
- IAH
1 stop27h 50m
KLM
Deal found 7/3![KLM logo]()
$725
This FlightHub deal was found by Cheapflights users on 7/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:44 am
IAH
- FNC
2 stops19h 46m
TAP AIR PORTUGAL
Tue 11/1711:10 am
FNC
- IAH
2 stops29h 44m
TAP AIR PORTUGAL
Deal found 7/3![TAP AIR PORTUGAL logo]()
$1,023
This FlightHub deal was found by Cheapflights users on 7/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:10 pm
IAH
- FNC
2 stops62h 15m
Lufthansa
Tue 11/172:50 pm
FNC
- IAH
1 stop29h 10m
Lufthansa
Deal found 7/3![Lufthansa logo]()
$1,155
This United Airlines deal was found by Cheapflights users on 7/2. 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 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 7/2![United Airlines logo]()
$723
This Delta deal was found by Cheapflights users on 7/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:50 am
IAH
- LIS
2 stops17h 30m
Delta
Tue 11/175:00 am
LIS
- IAH
2 stops19h 59m
Delta
Deal found 7/3![Delta logo]()
$739
This KLM deal was found by Cheapflights users on 7/3. 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 11/311:05 am
HOU
- LIS
2 stops14h 55m
KLM
Tue 11/1010:00 am
LIS
- HOU
2 stops17h 43m
KLM
Deal found 7/3![KLM logo]()
$750
This United Airlines deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 7/4![United Airlines logo]()
$727
This Delta deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 11/106:00 am
HOU
- LIS
2 stops20h 00m
Delta
Wed 11/185:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 7/5![Delta logo]()
$739
This United Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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 11/119:40 am
IAH
- OPO
2 stops17h 50m
United Airlines
Fri 11/1312:35 pm
OPO
- IAH
2 stops18h 26m
United Airlines
Deal found 7/6![United Airlines logo]()
$730
This Delta deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 11/111:00 pm
HOU
- LIS
2 stops20h 10m
Delta
Thu 11/195:00 am
LIS
- HOU
2 stops22h 43m
Delta
Deal found 7/4![Delta logo]()
$739
This KLM deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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
Mon 10/197:55 pm
OPO
- IAH
1 stop23h 20m
KLM
Deal found 7/6![KLM logo]()
$814
This KLM deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 7/5![KLM logo]()
$814
This United Airlines deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 12/61:35 pm
IAH
- LIS
1 stop12h 35m
United Airlines
Thu 12/105:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 7/4![United Airlines logo]()
$766
This Delta deal was found by Cheapflights users on 7/2. 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 11/2310:05 am
HOU
- LIS
2 stops15h 55m
Delta
Thu 11/2611:15 am
LIS
- HOU
2 stops16h 28m
Delta
Deal found 7/2![Delta logo]()
$794
This United Airlines deal was found by Cheapflights users on 7/3. 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.
Sun 12/67:40 am
IAH
- LIS
1 stop18h 30m
United Airlines
Sun 12/135:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 7/3![United Airlines logo]()
$795
This Delta deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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 12/69:40 am
IAH
- LIS
2 stops19h 40m
Delta
Sun 12/135:00 am
LIS
- IAH
1 stop14h 25m
Delta
Deal found 7/6![Delta logo]()
$801
This United deal was found by Cheapflights users on 7/3. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:10 pm
IAH
- FNC
1 stop15h 50m
Multiple Airlines
Mon 11/162:30 pm
FNC
- IAH
2 stops29h 30m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$1,182
This United Airlines deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 7/4![United Airlines logo]()
$810
This Iberia deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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.
Mon 7/206:49 pm
HOU
- FNC
2 stops36h 06m
Iberia
Mon 8/311:00 am
FNC
- HOU
2 stops38h 57m
Iberia
Deal found 7/4![Iberia logo]()
$2,616
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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.
Sat 9/511:53 am
IAH
- FNC
2 stops31h 37m
Multiple Airlines
Sat 9/125:50 am
FNC
- IAH
2 stops22h 09m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$1,194
This Delta deal was found by Cheapflights users on 7/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/55:26 pm
HOU
- OPO
2 stops22h 34m
Delta
Wed 10/1411:45 am
OPO
- HOU
2 stops17h 24m
Delta
Deal found 7/3![Delta logo]()
$834
This United Airlines deal was found by Cheapflights users on 7/2. 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.
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 7/2![United Airlines logo]()
$810
This KLM deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 9/193:20 pm
IAH
- FNC
2 stops20h 30m
KLM
Sat 9/267:30 pm
FNC
- IAH
1 stop23h 45m
KLM
Deal found 7/5![KLM logo]()
$1,088
This KAYAK deal was found by Cheapflights users on 7/3. 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 KAYAK 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 11/2811:45 am
FNC
- IAH
2 stops56h 15m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$1,222
This Delta deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 7/4![Delta logo]()
$880
This KLM deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 9/183:20 pm
IAH
- FNC
1 stop21h 20m
KLM
Sat 9/267:30 pm
FNC
- IAH
1 stop23h 45m
KLM
Deal found 7/5![KLM logo]()
$1,091
This United Airlines deal was found by Cheapflights users on 7/2. 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 11/228:34 pm
IAH
- LIS
1 stop31h 46m
United Airlines
Sun 11/2912:25 pm
LIS
- IAH
1 stop31h 35m
United Airlines
Deal found 7/2![United Airlines logo]()
$845
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated July 7, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated July 7, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 8/99:10 pm
IAH
- LIS
1 stop20h 05m
Multiple Airlines
Tue 8/258:25 am
LIS
- IAH
2 stops31h 29m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$799
This Gotogate deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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.
Sun 8/99:10 pm
IAH
- LIS
1 stop20h 05m
Turkish Airlines
Tue 8/2510:55 am
LIS
- IAH
1 stop38h 20m
Turkish Airlines
Deal found 7/5![Turkish Airlines logo]()
$806
This Gotogate deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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.
Sun 8/99:10 pm
IAH
- OPO
1 stop30h 30m
Turkish Airlines
Tue 8/254:50 pm
OPO
- IAH
1 stop32h 25m
Turkish Airlines
Deal found 7/4![Turkish Airlines logo]()
$826
This KLM deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/95:48 pm
IAH
- OPO
2 stops15h 42m
KLM
Tue 8/2511:35 am
OPO
- IAH
1 stop31h 45m
KLM
Deal found 7/4![KLM logo]()
$873
This KLM deal was found by Cheapflights users on 7/3. 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 8/103:55 pm
IAH
- OPO
1 stop17h 30m
KLM
Mon 8/244:20 pm
OPO
- IAH
1 stop27h 00m
KLM
Deal found 7/3![KLM logo]()
$866
This Turkish Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:10 pm
IAH
- OPO
1 stop36h 30m
Turkish Airlines
Mon 8/2410:40 am
OPO
- IAH
1 stop38h 35m
Turkish Airlines
Deal found 7/6![Turkish Airlines logo]()
$876
This CheapOair deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/172:30 pm
IAH
- LIS
1 stop37h 25m
Turkish Airlines
Mon 8/245:55 am
LIS
- IAH
1 stop19h 20m
Turkish Airlines
Deal found 7/5![Turkish Airlines logo]()
$862
This Kiwi.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 8/189:10 pm
IAH
- LIS
1 stop20h 10m
Multiple Airlines
Tue 8/2512:30 pm
LIS
- IAH
2 stops27h 24m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$830
This Turkish Airlines deal was found by Cheapflights users on 7/7. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/189:10 pm
IAH
- OPO
1 stop36h 30m
Turkish Airlines
Wed 8/264:40 pm
OPO
- IAH
1 stop32h 35m
Turkish Airlines
Deal found 7/7![Turkish Airlines logo]()
$836
This United Airlines deal was found by Cheapflights users on 7/7. 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.
Tue 8/1810:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Wed 8/2611:20 am
OPO
- IAH
2 stops30h 26m
United Airlines
Deal found 7/7![United Airlines logo]()
$863
This Gotogate deal was found by Cheapflights users on 7/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:45 am
IAH
- OPO
2 stops13h 15m
Multiple Airlines
Wed 8/2611:20 am
OPO
- IAH
2 stops16h 51m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$877
This Turkish Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:10 pm
IAH
- LIS
1 stop20h 35m
Turkish Airlines
Fri 9/45:55 am
LIS
- IAH
1 stop19h 20m
Turkish Airlines
Deal found 7/5![Turkish Airlines logo]()
$822
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 July 7, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated July 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 10/1512:21 pm
IAH
- LIS
3 stops50h 29m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 10/1512:21 pm
IAH
- OPO
2 stops37h 24m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 10/2012:21 pm
IAH
- OPO
2 stops28h 34m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 7/3. 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.
Sat 10/1712:21 pm
IAH
- LIS
3 stops51h 14m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 10/2412:21 pm
IAH
- LIS
2 stops29h 54m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$322
This Travelocity deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:00 am
IAH
- OPO
1 stop15h 00m
Air Canada
Deal found 7/5![Air Canada logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Sat 7/257:23 pm
IAH
- LIS
3 stops44h 07m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 12/76:00 am
IAH
- OPO
1 stop21h 30m
United Airlines
Deal found 7/5![United Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 12/81:00 pm
HOU
- OPO
2 stops27h 00m
Delta
Deal found 7/5![Delta logo]()
$338
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 12/298:40 am
IAH
- OPO
2 stops18h 50m
United Airlines
Deal found 7/5![United Airlines logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 41m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$344
This oojo deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” 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.
Wed 10/219:10 pm
IAH
- LIS
1 stop14h 45m
British Airways
Deal found 7/6![British Airways logo]()
$346
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 July 7, 2026.
Round-trip from | $707 (United) |
|---|---|
One-way from | $264 (Kiwi.com) |
Popular in | June |
Cheapest in | April |
Average price | $1,272 |
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 July 7, 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
Tue 11/10
9:35 am-9:30 am
1 stop17h 55m
Porto
Fri 11/20
6:00 am-6:15 pm
1 stop18h 15m
$707
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 11/10
7:20 am-9:30 am
2 stops20h 10m
Porto
Fri 11/20
6:00 am-6:15 pm
1 stop18h 15m
$711
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Tue 11/10
6:00 am-10:35 am
2 stops22h 35m
Porto
Fri 11/20
5:00 am-9:43 pm
2 stops22h 43m
$722
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
12:55 pm-8:00 am
1 stop13h 05m
Lisbon Humberto Delgado
Tue 11/17
3:35 pm-1:25 pm
1 stop27h 50m
$725
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
$727
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 11/11
9:40 am-9:30 am
2 stops17h 50m
Porto
Fri 11/13
12:35 pm-1:01 am
2 stops18h 26m
$730
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 11/11
11:50 am-11:20 am
2 stops17h 30m
Lisbon Humberto Delgado
Tue 11/17
5:00 am-6:59 pm
2 stops19h 59m
$739
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Tue 11/10
6:00 am-8:00 am
2 stops20h 00m
Lisbon Humberto Delgado
Wed 11/18
5:00 am-9:43 pm
2 stops22h 43m
$739
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 11/11
1:00 pm-3:10 pm
2 stops20h 10m
Lisbon Humberto Delgado
Thu 11/19
5:00 am-9:43 pm
2 stops22h 43m
$739
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
HOU-OPO
IAH-LIS
HOU-LIS
IAH-FNC
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston to Portugal
HO1-PT0
IAH-OPO
HOU-OPO
IAH-LIS
HOU-LIS
What is the cheapest month to book a flight from Houston to Portugal?
Currently, November is the cheapest month in which you can book a flight from Houston to Portugal (average of $267). 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 56 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 July 7, 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.
Food
7.3
Boarding
7.8
Comfort
7.7
Crew
8.4
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Boarding
7.8
Comfort
7.7
Crew
8.4
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Boarding
7.8
Comfort
7.7
Crew
8.4
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Boarding
7.8
Comfort
7.7
Crew
8.4
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Boarding
7.8
Comfort
7.7
Crew
8.4
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Boarding
7.8
Comfort
7.7
Crew
8.4
Overall
7.8
Entertainment
7.2
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.
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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 July 7, 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 July 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$466 | Average$870 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$922 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$830 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$862 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$581 | Average$1,035 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$726 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$841 | FlexibilityNo cancel fee | On-time67% |