$287+ 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — LIS
Sep 1 — Sep 81
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 August 2, 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 August 2, 2026.
This Expedia deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/1511:50 am
IAH
- OPO
2 stops18h 15m
Multiple Airlines
Fri 11/2012:35 pm
OPO
- IAH
2 stops17h 55m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$701
This Expedia deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/1012:00 pm
IAH
- LIS
1 stop15h 20m
Multiple Airlines
Wed 11/185:00 am
LIS
- IAH
1 stop15h 00m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$705
This Gotogate deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/14:10 pm
IAH
- LIS
1 stop24h 40m
Multiple Airlines
Wed 11/115:00 am
LIS
- IAH
2 stops35h 53m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$708
This Air France deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/27:10 pm
IAH
- OPO
1 stop20h 50m
Multiple Airlines
Fri 11/65:00 am
OPO
- IAH
1 stop14h 05m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$708
This Expedia deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/154:10 pm
IAH
- OPO
1 stop17h 10m
Lufthansa
Fri 11/206:00 am
OPO
- IAH
2 stops24h 30m
Lufthansa
Deal found 7/31![Lufthansa logo]()
$709
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/211:22 am
IAH
- OPO
2 stops17h 13m
Delta
Fri 11/65:00 am
OPO
- IAH
1 stop14h 05m
Delta
Deal found 7/31![Delta logo]()
$712
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:59 pm
IAH
- OPO
2 stops31h 31m
United Airlines
Fri 11/66:00 am
OPO
- IAH
2 stops21h 27m
United Airlines
Deal found 7/29![United Airlines logo]()
$721
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/1510:25 am
HOU
- OPO
2 stops18h 10m
Delta
Fri 11/205:00 am
OPO
- HOU
2 stops24h 13m
Delta
Deal found 7/31![Delta logo]()
$722
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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 7/29![United Airlines logo]()
$722
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 7/30![United Airlines logo]()
$723
This Expedia deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/111:40 am
IAH
- LIS
2 stops18h 10m
Iberia
Mon 11/238:45 pm
LIS
- IAH
2 stops17h 37m
Iberia
Deal found 7/31![Iberia logo]()
$724
This Expedia deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/109:57 am
HOU
- LIS
2 stops15h 43m
Iberia
Wed 11/186:45 pm
LIS
- HOU
2 stops20h 43m
Iberia
Deal found 7/31![Iberia logo]()
$724
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 August 2, 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 August 2, 2026.
This United Airlines deal was found by Cheapflights users on 8/1. 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 11/27:59 pm
IAH
- OPO
2 stops31h 31m
United Airlines
Fri 11/66:00 am
OPO
- IAH
2 stops21h 27m
United Airlines
Deal found 8/1![United Airlines logo]()
$721
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/1510:25 am
HOU
- OPO
2 stops18h 10m
Delta
Fri 11/205:00 am
OPO
- HOU
2 stops24h 13m
Delta
Deal found 7/31![Delta logo]()
$722
This KLM deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/212:03 pm
IAH
- LIS
2 stops14h 57m
KLM
Mon 11/2311:30 am
LIS
- IAH
2 stops18h 29m
KLM
Deal found 7/31![KLM logo]()
$790
This Expedia deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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.
Fri 12/43:50 pm
IAH
- FNC
1 stop18h 05m
British Airways
Wed 12/93:10 pm
FNC
- IAH
1 stop28h 55m
British Airways
Deal found 7/31![British Airways logo]()
$807
This Turkish Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:15 pm
IAH
- LIS
1 stop20h 30m
Turkish Airlines
Fri 9/45:55 am
LIS
- IAH
1 stop19h 25m
Turkish Airlines
Deal found 7/29![Turkish Airlines logo]()
$822
This Iberia deal was found by Cheapflights users on 8/1. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:47 pm
IAH
- FNC
2 stops38h 08m
Multiple Airlines
Tue 10/67:35 pm
FNC
- IAH
2 stops30h 52m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$956
This Iberia deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/261:16 pm
IAH
- FNC
2 stops17h 09m
Iberia
Wed 9/21:35 pm
FNC
- IAH
2 stops40h 24m
Iberia
Deal found 7/29![Iberia logo]()
$999
This Priceline deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:13 pm
IAH
- FNC
2 stops28h 57m
TAP AIR PORTUGAL
Tue 9/158:15 am
FNC
- IAH
2 stops32h 43m
TAP AIR PORTUGAL
Deal found 7/28![TAP AIR PORTUGAL logo]()
$1,089
This Air France deal was found by Cheapflights users on 8/1. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:20 pm
HOU
- OPO
2 stops16h 10m
Air France
Fri 10/25:55 am
OPO
- HOU
2 stops16h 30m
Air France
Deal found 8/1![Air France logo]()
$1,181
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/1811:50 am
IAH
- LIS
1 stop13h 05m
United Airlines
Thu 11/265:00 am
LIS
- IAH
1 stop15h 00m
United Airlines
Deal found 7/31![United Airlines logo]()
$722
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/1710:25 am
HOU
- LIS
2 stops15h 35m
Delta
Thu 11/265:00 am
LIS
- HOU
2 stops24h 13m
Delta
Deal found 7/31![Delta logo]()
$739
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:05 pm
IAH
- LIS
2 stops26h 50m
United Airlines
Wed 11/185:00 am
LIS
- IAH
1 stop15h 00m
United Airlines
Deal found 7/29![United Airlines logo]()
$726
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 stops23h 25m
Delta
Wed 11/185:00 am
LIS
- HOU
2 stops24h 13m
Delta
Deal found 7/30![Delta logo]()
$739
This KLM deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 1/287:10 pm
IAH
- OPO
1 stop20h 50m
KLM
Mon 2/85:55 am
OPO
- IAH
1 stop16h 55m
KLM
Deal found 7/30![KLM logo]()
$822
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/154:10 pm
IAH
- OPO
1 stop13h 35m
United Airlines
Fri 11/2012:35 pm
OPO
- IAH
1 stop14h 52m
United Airlines
Deal found 7/31![United Airlines logo]()
$740
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:00 am
HOU
- LIS
2 stops20h 00m
Delta
Thu 11/195:00 am
LIS
- HOU
2 stops24h 13m
Delta
Deal found 7/28![Delta logo]()
$744
This Turkish Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/22:30 pm
IAH
- OPO
1 stop19h 10m
Turkish Airlines
Thu 10/294:25 pm
OPO
- IAH
1 stop32h 40m
Turkish Airlines
Deal found 7/31![Turkish Airlines logo]()
$906
This United Airlines deal was found by Cheapflights users on 8/1. 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 11/14:10 pm
IAH
- OPO
1 stop17h 10m
United Airlines
Thu 11/512:35 pm
OPO
- IAH
2 stops25h 51m
United Airlines
Deal found 8/1![United Airlines logo]()
$745
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/154:28 pm
IAH
- LIS
2 stops19h 02m
Delta
Fri 11/205:00 am
LIS
- IAH
2 stops21h 17m
Delta
Deal found 7/31![Delta logo]()
$782
This Flysmarter deal was found by Cheapflights users on 8/1. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:18 pm
HOU
- FNC
2 stops20h 17m
British Airways
Tue 10/67:35 pm
FNC
- HOU
2 stops27h 01m
British Airways
Deal found 8/1![British Airways logo]()
$1,077
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:46 pm
IAH
- FNC
2 stops17h 44m
TAP AIR PORTUGAL
Mon 11/166:10 pm
FNC
- IAH
2 stops46h 44m
TAP AIR PORTUGAL
Deal found 7/28![TAP AIR PORTUGAL logo]()
$1,151
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 11/133:05 pm
HOU
- LIS
2 stops20h 25m
Delta
Tue 11/175:00 am
LIS
- HOU
2 stops24h 13m
Delta
Deal found 7/30![Delta logo]()
$789
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 12/302:39 pm
IAH
- LIS
1 stop11h 31m
United Airlines
Sun 1/105:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 7/30![United Airlines logo]()
$814
This Mytrip deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:00 am
IAH
- FNC
3 stops32h 10m
Multiple Airlines
Tue 9/157:35 pm
FNC
- IAH
2 stops32h 17m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$1,197
This Delta deal was found by Cheapflights users on 8/2. 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 11/35:28 pm
HOU
- LIS
2 stops15h 42m
Delta
Mon 11/95:00 am
LIS
- HOU
2 stops24h 13m
Delta
Deal found 8/2![Delta logo]()
$789
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/1. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/89:49 am
IAH
- FNC
2 stops19h 51m
Multiple Airlines
Mon 10/1212:40 pm
FNC
- IAH
2 stops28h 15m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$1,213
This KLM deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/293:25 pm
IAH
- FNC
1 stop20h 25m
KLM
Sat 9/57:30 pm
FNC
- IAH
1 stop23h 50m
KLM
Deal found 7/30![KLM logo]()
$1,228
This Expedia deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:19 pm
HOU
- FNC
2 stops34h 21m
Iberia
Sun 10/411:20 am
FNC
- HOU
2 stops18h 30m
Iberia
Deal found 7/28![Iberia logo]()
$1,369
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/312:39 pm
IAH
- LIS
1 stop11h 31m
United Airlines
Sun 1/105:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 7/30![United Airlines logo]()
$864
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:09 pm
HOU
- LIS
2 stops17h 26m
Delta
Wed 10/145:00 am
LIS
- HOU
2 stops24h 03m
Delta
Deal found 7/30![Delta logo]()
$803
Last-minute flights from Houston to PortugalDiscover last-minute flight deals from Houston to Portugal. Data last updated August 2, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Portugal. Data last updated August 2, 2026 and is based on user searches.
This Turkish Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:15 pm
IAH
- OPO
1 stop36h 25m
Turkish Airlines
Mon 8/246:30 am
OPO
- IAH
1 stop18h 50m
Turkish Airlines
Deal found 7/28![Turkish Airlines logo]()
$876
This Gotogate deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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.
Thu 8/139:15 pm
IAH
- OPO
1 stop20h 15m
Turkish Airlines
Thu 8/276:10 am
OPO
- IAH
1 stop19h 10m
Turkish Airlines
Deal found 7/31![Turkish Airlines logo]()
$831
This Turkish Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:15 pm
IAH
- LIS
1 stop30h 40m
Turkish Airlines
Mon 8/245:55 am
LIS
- IAH
1 stop19h 25m
Turkish Airlines
Deal found 7/29![Turkish Airlines logo]()
$862
This CheapOair deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 8/199:15 pm
IAH
- LIS
1 stop20h 30m
Turkish Airlines
Fri 8/285:55 am
LIS
- IAH
1 stop19h 25m
Turkish Airlines
Deal found 7/30![Turkish Airlines logo]()
$907
This CheapOair deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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.
Fri 8/219:15 pm
IAH
- LIS
1 stop30h 35m
Turkish Airlines
Wed 8/264:45 pm
LIS
- IAH
1 stop32h 35m
Turkish Airlines
Deal found 7/30![Turkish Airlines logo]()
$937
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 8/259:15 pm
IAH
- LIS
1 stop36h 20m
Multiple Airlines
Sat 9/125:25 pm
LIS
- IAH
2 stops46h 01m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$931
This FlightHub deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:15 pm
IAH
- LIS
1 stop20h 30m
Turkish Airlines
Tue 9/110:55 am
LIS
- IAH
1 stop38h 25m
Turkish Airlines
Deal found 7/28![Turkish Airlines logo]()
$812
This Turkish Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:15 pm
IAH
- LIS
1 stop20h 30m
Turkish Airlines
Fri 9/45:55 am
LIS
- IAH
1 stop19h 25m
Turkish Airlines
Deal found 7/29![Turkish Airlines logo]()
$822
This Mytrip deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:10 pm
IAH
- LIS
2 stops22h 05m
Multiple Airlines
Tue 9/18:05 pm
LIS
- IAH
2 stops25h 35m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$847
This Turkish Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:15 pm
IAH
- LIS
1 stop36h 30m
Turkish Airlines
Thu 9/35:05 pm
LIS
- IAH
1 stop25h 40m
Turkish Airlines
Deal found 7/28![Turkish Airlines logo]()
$882
This FlightHub deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/282:30 pm
IAH
- LIS
1 stop26h 50m
Turkish Airlines
Thu 9/310:50 am
LIS
- IAH
1 stop38h 30m
Turkish Airlines
Deal found 7/28![Turkish Airlines logo]()
$922
This Mytrip deal was found by Cheapflights users on 8/1. 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.
Mon 8/313:35 pm
IAH
- LIS
2 stops25h 45m
Multiple Airlines
Mon 9/79:15 pm
LIS
- IAH
3 stops28h 37m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$897
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 August 2, 2026.
Search for one-way flight options from Houston to Portugal. Find affordable one-way fares based on user searches. Data last updated August 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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
3 stops26h 54m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 10/127:42 pm
IAH
- OPO
2 stops40h 38m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/12:18 pm
IAH
- OPO
3 stops51h 02m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:04 pm
IAH
- LIS
3 stops40h 41m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/222:18 pm
IAH
- LIS
3 stops47h 32m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2911:35 am
IAH
- OPO
3 stops53h 15m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$340
This oojo deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:50 pm
IAH
- LIS
1 stop17h 00m
British Airways
Deal found 7/28![British Airways logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:30 am
IAH
- LIS
3 stops46h 30m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Fri 11/66:20 pm
IAH
- OPO
2 stops59h 15m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$352
This oojo deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 12/98:10 am
IAH
- LIS
1 stop17h 30m
British Airways
Deal found 7/30![British Airways logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/309:04 pm
IAH
- OPO
3 stops40h 06m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$355
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:53 pm
IAH
- LIS
2 stops15h 27m
United Airlines
Deal found 7/29![United Airlines logo]()
$360
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 August 2, 2026.
Round-trip from | $282 (Trip.com) |
|---|---|
Popular in | June |
Cheapest in | April |
Average price | $1,168 |
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 August 2, 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 11/2
7:59 pm-9:30 am
2 stops31h 31m
Porto
Fri 11/6
6:00 am-9:27 pm
2 stops21h 27m
$721
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Sun 11/15
10:25 am-10:35 am
2 stops18h 10m
Porto
Fri 11/20
5:00 am-11:13 pm
2 stops24h 13m
$722
Quickest round-trip
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 11/18
11:50 am-6:55 am
1 stop13h 05m
Lisbon Humberto Delgado
Thu 11/26
5:00 am-2:00 pm
1 stop15h 00m
$722
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 11/10
10:05 pm-6:55 am
2 stops26h 50m
Lisbon Humberto Delgado
Wed 11/18
5:00 am-2:00 pm
1 stop15h 00m
$726
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Tue 11/17
10:25 am-8:00 am
2 stops15h 35m
Lisbon Humberto Delgado
Thu 11/26
5:00 am-11:13 pm
2 stops24h 13m
$739
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Tue 11/10
6:00 am-11:25 am
2 stops23h 25m
Lisbon Humberto Delgado
Wed 11/18
5:00 am-11:13 pm
2 stops24h 13m
$739
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sun 11/15
4:10 pm-11:45 am
1 stop13h 35m
Porto
Fri 11/20
12:35 pm-9:27 pm
1 stop14h 52m
$740
HoustonLisbon
HOU - LIS
HOULIS
Houston Hobby
Wed 11/11
6:00 am-8:00 am
2 stops20h 00m
Lisbon Humberto Delgado
Thu 11/19
5:00 am-11:13 pm
2 stops24h 13m
$744
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sun 11/1
4:10 pm-3:20 pm
1 stop17h 10m
Porto
Thu 11/5
12:35 pm-8:26 am
2 stops25h 51m
$745
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Sun 11/15
4:28 pm-5:30 pm
2 stops19h 02m
Lisbon Humberto Delgado
Fri 11/20
5:00 am-8:17 pm
2 stops21h 17m
$782
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
IAH-FNC
HOU-LIS
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
IAH-FNC
What is the cheapest month to book a flight from Houston to Portugal?
Currently, January is the cheapest month in which you can book a flight from Houston to Portugal (average of $682). Flying from Houston to Portugal in June is currently the most expensive (average of $1,349). 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 79 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 August 2, 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
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
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 August 2, 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 August 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$476 | Average$957 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$512 | Average$772 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$529 | Average$1,135 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$534 | Average$882 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$559 | Average$846 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$575 | Average$1,096 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$731 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$870 | FlexibilityNo cancel fee | On-time67% |