$334+ 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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Jul 6 — Jul 131
Round-trip
1 adult, Economy
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Find cheap flights from Houston to Portugal with Cheapflights
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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 June 6, 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 6, 2026.
This United Airlines deal was found by Cheapflights users on 6/5. 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 11/1610:00 am
IAH
- OPO
1 stop17h 30m
United Airlines
Thu 11/196:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 6/5![United Airlines logo]()
$707
This Air France deal was found by Cheapflights users on 6/6. 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 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 6/6![Multiple Airlines logo]()
$709
This KLM deal was found by Cheapflights users on 6/3. 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.
Sun 11/81:15 pm
IAH
- OPO
2 stops13h 50m
KLM
Mon 11/1611:15 am
OPO
- IAH
1 stop31h 50m
KLM
Deal found 6/3![KLM logo]()
$714
This Expedia deal was found by Cheapflights users on 6/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/912:10 pm
IAH
- OPO
2 stops17h 55m
Multiple Airlines
Wed 11/187:20 pm
OPO
- IAH
2 stops32h 19m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$721
This Air France deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/161:00 pm
HOU
- OPO
2 stops15h 30m
Multiple Airlines
Thu 11/195:00 am
OPO
- HOU
2 stops17h 30m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$724
This Expedia deal was found by Cheapflights users on 6/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:41 am
IAH
- OPO
2 stops14h 59m
Iberia
Mon 11/99:55 pm
OPO
- IAH
2 stops28h 05m
Iberia
Deal found 6/4![Iberia logo]()
$741
This United Airlines deal was found by Cheapflights users on 6/3. 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 11/87:59 pm
IAH
- OPO
2 stops31h 31m
United Airlines
Mon 11/166:00 am
OPO
- IAH
2 stops23h 35m
United Airlines
Deal found 6/3![United Airlines logo]()
$772
This Delta deal was found by Cheapflights users on 6/6. 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 11/88:15 am
IAH
- OPO
2 stops20h 15m
Delta
Mon 11/165:00 am
OPO
- IAH
2 stops19h 17m
Delta
Deal found 6/6![Delta logo]()
$773
This Delta deal was found by Cheapflights users on 6/3. 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.
Sun 11/86:00 am
HOU
- OPO
2 stops21h 05m
Delta
Mon 11/1611:00 am
OPO
- HOU
2 stops16h 43m
Delta
Deal found 6/3![Delta logo]()
$781
This Air France deal was found by Cheapflights users on 6/4. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/31:15 pm
IAH
- OPO
2 stops15h 15m
Multiple Airlines
Mon 11/911:15 am
OPO
- IAH
1 stop31h 50m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$789
This Expedia deal was found by Cheapflights users on 6/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:11 am
HOU
- OPO
2 stops15h 29m
Iberia
Mon 11/98:40 pm
OPO
- HOU
2 stops17h 55m
Iberia
Deal found 6/4![Iberia logo]()
$805
This Air France deal was found by Cheapflights users on 6/5. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:55 pm
IAH
- OPO
1 stop15h 35m
Multiple Airlines
Sun 11/111:15 am
OPO
- IAH
1 stop31h 50m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$809
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 6, 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 6, 2026.
This United Airlines deal was found by Cheapflights users on 6/5. 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 11/167:30 am
IAH
- OPO
2 stops20h 00m
United Airlines
Thu 11/196:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 6/5![United Airlines logo]()
$712
This Delta deal was found by Cheapflights users on 6/6. 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 11/86:00 am
HOU
- OPO
2 stops21h 05m
Delta
Mon 11/1611:00 am
OPO
- HOU
2 stops16h 43m
Delta
Deal found 6/6![Delta logo]()
$781
This KLM deal was found by Cheapflights users on 6/3. 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 8/185:20 pm
HOU
- OPO
2 stops16h 05m
Multiple Airlines
Wed 8/265:55 am
OPO
- HOU
2 stops16h 30m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$889
This Virgin Atlantic deal was found by Cheapflights users on 6/2. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:00 pm
HOU
- LIS
2 stops15h 45m
Virgin Atlantic
Fri 11/611:15 am
LIS
- HOU
2 stops16h 28m
Virgin Atlantic
Deal found 6/2![Virgin Atlantic logo]()
$924
This KLM deal was found by Cheapflights users on 6/3. 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.
Thu 8/205:48 pm
IAH
- OPO
2 stops15h 42m
KLM
Tue 8/254:20 pm
OPO
- IAH
1 stop27h 00m
KLM
Deal found 6/3![KLM logo]()
$936
This Turkish Airlines deal was found by Cheapflights users on 6/4. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/219:00 pm
IAH
- LIS
1 stop36h 10m
Turkish Airlines
Mon 11/304:10 pm
LIS
- IAH
1 stop27h 00m
Turkish Airlines
Deal found 6/4![Turkish Airlines logo]()
$963
This British Airways deal was found by Cheapflights users on 6/4. 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 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
Wed 7/2912:10 pm
FNC
- IAH
1 stop31h 15m
British Airways
Deal found 6/4![British Airways logo]()
$1,026
This Iberia deal was found by Cheapflights users on 6/5. 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 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 6/5![Iberia logo]()
$1,091
This TAP AIR PORTUGAL deal was found by Cheapflights users on 6/2. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/131:46 pm
IAH
- FNC
2 stops17h 44m
TAP AIR PORTUGAL
Tue 11/1711:10 am
FNC
- IAH
2 stops29h 44m
TAP AIR PORTUGAL
Deal found 6/2![TAP AIR PORTUGAL logo]()
$1,146
This United Airlines deal was found by Cheapflights users on 6/4. 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 6/4![United Airlines logo]()
$811
This Delta deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/101:13 pm
HOU
- OPO
2 stops20h 12m
Delta
Fri 8/215:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 6/1![Delta logo]()
$881
This United Airlines deal was found by Cheapflights users on 6/4. 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 10/166:15 am
IAH
- OPO
2 stops18h 55m
United Airlines
Wed 10/2111:20 am
OPO
- IAH
2 stops30h 21m
United Airlines
Deal found 6/4![United Airlines logo]()
$816
This KLM deal was found by Cheapflights users on 6/3. 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 8/195:48 pm
IAH
- OPO
2 stops15h 42m
KLM
Mon 8/2411:25 am
OPO
- IAH
2 stops18h 27m
KLM
Deal found 6/3![KLM logo]()
$946
This Delta deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:00 am
HOU
- LIS
2 stops23h 15m
Delta
Wed 9/305:35 am
LIS
- HOU
2 stops23h 00m
Delta
Deal found 6/2![Delta logo]()
$925
This United Airlines deal was found by Cheapflights users on 6/3. 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 8/1910:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Tue 8/2512:15 pm
OPO
- IAH
2 stops33h 02m
United Airlines
Deal found 6/3![United Airlines logo]()
$863
This KLM deal was found by Cheapflights users on 6/5. 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.
Thu 11/124:10 pm
IAH
- FNC
2 stops19h 00m
KLM
Fri 11/206:00 pm
FNC
- IAH
1 stop25h 05m
KLM
Deal found 6/5![KLM logo]()
$952
This British Airways deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/53:30 pm
IAH
- LIS
1 stop25h 35m
British Airways
Sat 7/257:10 am
LIS
- IAH
1 stop36h 15m
British Airways
Deal found 6/1![British Airways logo]()
$1,061
This Delta deal was found by Cheapflights users on 6/5. 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.
Mon 8/101:13 pm
HOU
- OPO
2 stops20h 12m
Delta
Mon 8/245:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 6/5![Delta logo]()
$941
This British Airways deal was found by Cheapflights users on 6/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/23:40 pm
IAH
- LIS
1 stop25h 25m
British Airways
Wed 7/296:45 pm
LIS
- IAH
1 stop24h 40m
British Airways
Deal found 6/3![British Airways logo]()
$1,069
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Tue 9/156:05 pm
IAH
- OPO
2 stops30h 55m
United Airlines
Thu 9/246:00 am
OPO
- IAH
1 stop17h 50m
United Airlines
Deal found 6/4![United Airlines logo]()
$897
This Mytrip deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:00 am
IAH
- FNC
2 stops31h 25m
Multiple Airlines
Wed 8/265:50 am
FNC
- IAH
2 stops35h 00m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$1,237
This Delta deal was found by Cheapflights users on 6/5. 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.
Mon 8/1012:12 pm
IAH
- OPO
2 stops21h 13m
Delta
Mon 8/245:00 am
OPO
- IAH
2 stops19h 32m
Delta
Deal found 6/5![Delta logo]()
$941
This Turkish Airlines deal was found by Cheapflights users on 6/5. 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.
Fri 6/262:30 pm
IAH
- LIS
1 stop37h 20m
Turkish Airlines
Thu 7/25:05 pm
LIS
- IAH
1 stop25h 40m
Turkish Airlines
Deal found 6/5![Turkish Airlines logo]()
$1,312
This KLM deal was found by Cheapflights users on 6/5. 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.
Tue 9/223:20 pm
IAH
- FNC
1 stop35h 55m
KLM
Sat 10/37:30 pm
FNC
- IAH
1 stop23h 45m
KLM
Deal found 6/5![KLM logo]()
$1,124
This United Airlines deal was found by Cheapflights users on 6/4. 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 7/510:08 pm
IAH
- OPO
2 stops26h 52m
United Airlines
Tue 7/1412:15 pm
OPO
- IAH
1 stop13h 23m
United Airlines
Deal found 6/4![United Airlines logo]()
$931
This Delta deal was found by Cheapflights users on 6/3. 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.
Tue 8/181:13 pm
HOU
- OPO
2 stops20h 12m
Delta
Mon 8/245:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 6/3![Delta logo]()
$942
This Mytrip deal was found by Cheapflights users on 6/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/510:00 am
IAH
- FNC
3 stops27h 05m
Multiple Airlines
Mon 7/2010:45 pm
FNC
- IAH
3 stops26h 53m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,301
This Iberia deal was found by Cheapflights users on 6/4. 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 7/136:49 pm
HOU
- FNC
2 stops36h 06m
Iberia
Wed 7/291:35 pm
FNC
- HOU
2 stops40h 21m
Iberia
Deal found 6/4![Iberia logo]()
$1,439
This British Airways deal was found by Cheapflights users on 6/5. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/244:18 pm
HOU
- LIS
2 stops17h 12m
British Airways
Mon 9/287:10 am
LIS
- HOU
2 stops18h 38m
British Airways
Deal found 6/5![British Airways logo]()
$1,214
This Delta deal was found by Cheapflights users on 6/5. 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.
Fri 10/912:55 pm
IAH
- OPO
2 stops20h 30m
Delta
Sat 10/245:00 am
OPO
- IAH
1 stop14h 15m
Delta
Deal found 6/5![Delta logo]()
$945
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated June 6, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated June 6, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/510:08 pm
IAH
- OPO
2 stops26h 52m
United Airlines
Tue 7/1412:15 pm
OPO
- IAH
2 stops31h 08m
United Airlines
Deal found 6/1![United Airlines logo]()
$918
This Gotogate deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/66:45 am
IAH
- OPO
2 stops18h 15m
Multiple Airlines
Wed 7/2211:20 am
OPO
- IAH
1 stop14h 18m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$920
This Delta deal was found by Cheapflights users on 6/2. 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 7/63:25 pm
IAH
- OPO
1 stop24h 50m
Delta
Thu 7/305:00 am
OPO
- IAH
1 stop14h 20m
Delta
Deal found 6/2![Delta logo]()
$922
This Gotogate deal was found by Cheapflights users on 6/5. 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.
Mon 7/610:00 am
IAH
- OPO
1 stop15h 00m
Air Canada
Wed 7/226:20 am
OPO
- IAH
2 stops21h 46m
Air Canada
Deal found 6/5![Air Canada logo]()
$924
This United Airlines deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/610:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Wed 7/2211:20 am
OPO
- IAH
1 stop14h 18m
United Airlines
Deal found 6/1![United Airlines logo]()
$927
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Mon 7/610:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Wed 7/2912:35 pm
OPO
- IAH
1 stop17h 08m
United Airlines
Deal found 6/2![United Airlines logo]()
$933
This Air Canada deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/610:00 am
IAH
- OPO
1 stop15h 00m
Air Canada
Wed 7/2911:20 am
OPO
- IAH
2 stops37h 08m
Air Canada
Deal found 6/2![Air Canada logo]()
$935
This Delta deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:05 pm
IAH
- OPO
1 stop16h 20m
Delta
Thu 7/305:00 am
OPO
- IAH
1 stop14h 20m
Delta
Deal found 6/2![Delta logo]()
$917
This Delta deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:05 pm
IAH
- OPO
1 stop23h 00m
Delta
Tue 7/2812:25 pm
OPO
- IAH
1 stop15h 19m
Delta
Deal found 6/2![Delta logo]()
$934
This Delta deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/85:20 pm
IAH
- OPO
2 stops19h 00m
Delta
Thu 7/305:00 am
OPO
- IAH
2 stops19h 52m
Delta
Deal found 6/1![Delta logo]()
$936
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/238:37 pm
IAH
- LIS
1 stop35h 08m
Multiple Airlines
Mon 8/316:15 am
LIS
- IAH
2 stops34h 44m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$949
This Kiwi.com deal was found by Cheapflights users on 6/2. 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.
Fri 7/318:37 pm
IAH
- LIS
1 stop27h 18m
Multiple Airlines
Sat 8/226:10 am
LIS
- IAH
2 stops22h 09m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$920
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 6, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated June 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/221:29 pm
IAH
- OPO
3 stops37h 56m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$334
This Expedia deal was found by Cheapflights users on 6/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/83:30 pm
IAH
- LIS
1 stop13h 30m
Air Canada
Deal found 6/4![Air Canada logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 7/187:23 pm
IAH
- OPO
3 stops54h 37m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$354
This Expedia deal was found by Cheapflights users on 6/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:15 pm
IAH
- LIS
2 stops17h 30m
British Airways
Deal found 6/4![British Airways logo]()
$358
This United Airlines deal was found by Cheapflights users on 6/4. 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 11/85:05 pm
IAH
- LIS
1 stop11h 10m
United Airlines
Deal found 6/4![United Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 6/2. 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.
Sun 7/191:16 pm
IAH
- OPO
3 stops36h 44m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$369
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/211:29 pm
IAH
- OPO
3 stops45h 26m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$370
This Kiwi.com deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:23 pm
IAH
- LIS
3 stops46h 17m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$371
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Mon 9/217:53 pm
IAH
- LIS
2 stops40h 32m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$373
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:30 am
IAH
- OPO
3 stops42h 20m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Wed 7/151:29 pm
IAH
- LIS
3 stops39h 31m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/221:29 pm
IAH
- LIS
3 stops28h 11m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$389
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 6, 2026.
Round-trip from | $707 (United Airlines) |
|---|---|
One-way from | $334 (Kiwi.com) |
Popular in | June |
Cheapest in | April |
Average price | $1,293 |
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 6, 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 11/16
7:30 am-9:30 am
2 stops20h 00m
Porto
Thu 11/19
6:00 am-6:15 pm
1 stop18h 15m
$712
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Sun 11/8
6:00 am-9:05 am
2 stops21h 05m
Porto
Mon 11/16
11:00 am-9:43 pm
2 stops16h 43m
$781
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-1:28 pm
2 stops32h 13m
$811
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
6:15 am-7:10 am
2 stops18h 55m
Porto
Wed 10/21
11:20 am-11:41 am
2 stops30h 21m
$816
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 8/19
10:00 am-7:00 am
1 stop15h 00m
Porto
Tue 8/25
12:15 pm-3:17 pm
2 stops33h 02m
$863
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Mon 8/10
1:13 pm-3:25 pm
2 stops20h 12m
Porto
Fri 8/21
5:00 am-10:05 pm
2 stops23h 05m
$881
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Tue 8/18
5:20 pm-3:25 pm
2 stops16h 05m
Porto
Wed 8/26
5:55 am-4:25 pm
2 stops16h 30m
$889
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 9/15
6:05 pm-7:00 am
2 stops30h 55m
Porto
Thu 9/24
6:00 am-5:50 pm
1 stop17h 50m
$897
Quickest round-trip
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Fri 10/23
1:00 pm-10:45 am
2 stops15h 45m
Lisbon Humberto Delgado
Fri 11/6
11:15 am-9:43 pm
2 stops16h 28m
$924
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Sun 9/20
6:00 am-11:15 am
2 stops23h 15m
Lisbon Humberto Delgado
Wed 9/30
5:35 am-10:35 pm
2 stops23h 00m
$925
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-OPO
HOU-LIS
HOU-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-OPO
HOU-LIS
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 $961). 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 70 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 6, 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.
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
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.
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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 June 6, 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 6, 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$743 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$913 | FlexibilityNo cancel fee | On-time67% |