$462+ Cheap flights from Houston to Porto (OPO)
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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — OPO
Jul 9 — Jul 161
Round-trip
1 adult, Economy
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Find cheap flights from Houston to Porto with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Houston to PortoExplore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 9, 2026.
Explore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 9, 2026.
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:30 pm
IAH
- OPO
1 stop13h 00m
United Airlines
Thu 11/196:00 am
OPO
- IAH
1 stop18h 15m
United Airlines
Deal found 6/6![United Airlines logo]()
$707
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 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.
Mon 10/269:40 am
IAH
- OPO
2 stops19h 50m
Delta
Tue 11/35:00 am
OPO
- IAH
1 stop14h 05m
Delta
Deal found 6/7![Delta logo]()
$714
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:10 pm
IAH
- OPO
2 stops18h 40m
Multiple Airlines
Thu 11/197:20 pm
OPO
- IAH
2 stops32h 19m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$719
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 6/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:45 pm
IAH
- OPO
2 stops16h 15m
Multiple Airlines
Tue 11/312:25 pm
OPO
- IAH
2 stops18h 05m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$729
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 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 Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/810:11 am
HOU
- OPO
2 stops15h 29m
Multiple Airlines
Mon 11/168:40 pm
OPO
- HOU
2 stops17h 55m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$760
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 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
Best flights from Houston to PortoDiscover carefully curated flight deals from Houston to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 9, 2026.
Discover carefully curated flight deals from Houston to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 9, 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 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 11/145:00 am
OPO
- IAH
1 stop14h 05m
KLM
Deal found 6/8![KLM logo]()
$759
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 Air France 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 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
Sat 11/149:25 am
OPO
- IAH
2 stops18h 39m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$773
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 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
Wed 10/2111:20 am
OPO
- IAH
2 stops30h 21m
United Airlines
Deal found 6/4![United Airlines logo]()
$811
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/93:55 pm
IAH
- OPO
1 stop17h 35m
KLM
Wed 8/1911:45 am
OPO
- IAH
1 stop31h 35m
KLM
Deal found 6/6![KLM logo]()
$867
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 6/7. 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.
Wed 7/225:17 pm
HOU
- OPO
2 stops22h 43m
Delta
Wed 7/295:00 am
OPO
- HOU
2 stops22h 51m
Delta
Deal found 6/7![Delta logo]()
$931
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.
Wed 9/25:20 pm
HOU
- OPO
2 stops22h 55m
Delta
Wed 9/165:00 am
OPO
- HOU
2 stops23h 35m
Delta
Deal found 6/7![Delta logo]()
$936
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 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
Wed 7/295:55 am
OPO
- HOU
2 stops16h 28m
Delta
Deal found 6/8![Delta logo]()
$939
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.
Wed 9/210:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Wed 9/1611:20 am
OPO
- IAH
2 stops33h 57m
United Airlines
Deal found 6/8![United Airlines logo]()
$913
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.
Mon 8/101:13 pm
HOU
- OPO
2 stops20h 12m
Delta
Mon 8/245:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 6/6![Delta logo]()
$941
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.
Thu 10/226:00 am
HOU
- OPO
2 stops22h 30m
Delta
Sun 11/15:00 am
OPO
- HOU
2 stops17h 30m
Delta
Deal found 6/5![Delta logo]()
$1,079
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.
Mon 7/66:00 am
HOU
- OPO
2 stops20h 30m
Delta
Wed 7/225:55 am
OPO
- HOU
2 stops21h 56m
Delta
Deal found 6/6![Delta logo]()
$1,099
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 7/56:00 am
HOU
- OPO
2 stops22h 40m
Delta
Sat 7/256:30 am
OPO
- HOU
2 stops21h 21m
Delta
Deal found 6/6![Delta logo]()
$1,206
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 7/45:19 pm
HOU
- OPO
2 stops18h 51m
Delta
Thu 7/305:55 am
OPO
- HOU
2 stops21h 56m
Delta
Deal found 6/9![Delta logo]()
$1,296
Last-minute flights from Houston to PortoDiscover last-minute flight deals from Houston to Porto. Data last updated June 9, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Porto. Data last updated June 9, 2026 and is based on user searches.
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
2 stops29h 36m
United Airlines
Deal found 6/4![United Airlines logo]()
$918
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 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
Tue 7/285:00 am
OPO
- IAH
2 stops22h 44m
Delta
Deal found 6/8![Delta 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.
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 Air Canada 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 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
1 stop14h 18m
Air Canada
Deal found 6/8![Air Canada logo]()
$977
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.
Mon 7/66:00 am
HOU
- OPO
2 stops20h 30m
Delta
Wed 7/225:55 am
OPO
- HOU
2 stops21h 56m
Delta
Deal found 6/6![Delta logo]()
$1,099
This Air Canada 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 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 6/8![Air Canada logo]()
$935
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 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 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 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 7/215:17 pm
HOU
- OPO
2 stops22h 48m
Delta
Tue 8/45:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 6/8![Delta logo]()
$1,174
One-way flights from Houston to PortoSearch for one-way flight options from Houston to Porto. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
Search for one-way flight options from Houston to Porto. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
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 9/1510:00 am
IAH
- OPO
1 stop15h 00m
United Airlines
Deal found 6/8![United Airlines logo]()
$462
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.
Tue 9/810:05 am
HOU
- OPO
2 stops23h 20m
Delta
Deal found 6/6![Delta logo]()
$468
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:24 pm
IAH
- OPO
3 stops44h 41m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$512
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 6/158:55 pm
IAH
- OPO
3 stops44h 05m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$539
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:35 pm
HOU
- OPO
3 stops46h 20m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$660
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:00 am
HOU
- OPO
2 stops23h 55m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$769
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:31 pm
HOU
- OPO
3 stops58h 24m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$787
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/159:00 pm
IAH
- OPO
1 stop17h 05m
British Airways
Deal found 6/4![British Airways logo]()
$827
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2011:51 am
IAH
- OPO
2 stops25h 09m
TAP AIR PORTUGAL
Deal found 6/4![TAP AIR PORTUGAL logo]()
$829
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/143:35 pm
IAH
- OPO
1 stop25h 20m
Lufthansa
Deal found 6/8![Lufthansa logo]()
$841
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 6/2011:55 am
IAH
- OPO
2 stops36h 55m
United Airlines
Deal found 6/8![United Airlines logo]()
$851
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 6/155:08 pm
HOU
- OPO
2 stops16h 17m
Delta
Deal found 6/8![Delta logo]()
$857
Find flight deals from Houston to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 9, 2026.
Round-trip from | $707 (United Airlines) |
|---|---|
One-way from | $462 (United Airlines) |
Popular in | July |
Cheapest in | November |
Average price | $1,257 |
Cheapflights Fare Finder
Customize your flight search to find flights from Houston to Porto 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 9, 2026.
Use the filters below to find and compare flights from Houston to Porto 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
Quickest round-trip
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sun 11/8
4:05 pm-10:30 am
1 stop12h 25m
Porto
Sat 11/14
5:00 am-1:05 pm
1 stop14h 05m
$759
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 10/12
7:50 pm-7:00 am
2 stops29h 10m
Porto
Wed 10/21
11:20 am-11:41 am
2 stops30h 21m
$766
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sun 11/8
1:15 pm-10:30 am
2 stops15h 15m
Porto
Sat 11/14
9:25 am-10:04 pm
2 stops18h 39m
$773
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
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
Sun 8/9
3:55 pm-3:30 pm
1 stop17h 35m
Porto
Wed 8/19
11:45 am-1:20 pm
1 stop31h 35m
$867
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 9/15
7:00 am-7:00 am
2 stops18h 00m
Porto
Thu 9/24
6:00 am-7:02 pm
2 stops19h 02m
$907
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 9/2
10:00 am-7:00 am
1 stop15h 00m
Porto
Wed 9/16
11:20 am-3:17 pm
2 stops33h 57m
$913
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Wed 7/22
5:17 pm-10:00 pm
2 stops22h 43m
Porto
Wed 7/29
5:00 am-9:51 pm
2 stops22h 51m
$931
Showing 1-10 of 29 resultsSorted by cheapest first
Best time to book a flight from Houston to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from Houston with our price prediction graph.
HO1-OPO
IAH-OPO
HOU-OPO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston to Porto
HO1-OPO
IAH-OPO
HOU-OPO
What is the cheapest month to book a flight from Houston to Porto?
Currently, March is the cheapest month in which you can book a flight from Houston to Porto (average of $476). Flying from Houston to Porto in June is currently the most expensive (average of $1,146). 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 much does it cost to fly round-trip from Houston to Porto?
Reviews of airlines servicing Porto
Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated June 9, 2026.
Peruse reviews from past customers who have flown with KLM and United Airlines from Houston to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.7
Crew
8.4
Food
7.3
Overall
7.8
Entertainment
7.2
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Crew
8.4
Food
7.3
Overall
7.8
Entertainment
7.2
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Crew
8.4
Food
7.3
Overall
7.8
Entertainment
7.2
Boarding
7.8
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 Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra
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Complete your trip
Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Houston to Porto by cabin class
Find flights from Houston to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Houston and Porto flights
Browse other Houston and Porto flight options. Last updated on June 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 9, 2026.
Top 2 airlines flying from Houston to Porto
Discover the top 2 airlines that operate flights from Houston to Porto. 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 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$476 | Average$755 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$626 | Average$1,085 | FlexibilityNo cancel fee | On-time69% |