$280+ Cheap flights from George Bush Intcntl (IAH) 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Mar 15 — Mar 221
1 adult, Economy
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1. Tell us where you want to go
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Cheapest flights from George Bush Intcntl to PortugalExplore the most affordable flight options available from George Bush Intcntl to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.
Explore the most affordable flight options available from George Bush Intcntl to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.
This KLM deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/123:50 pm
IAH
- LIS
1 stop13h 25m
Multiple Airlines
Tue 4/219:20 am
LIS
- IAH
1 stop33h 55m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$536
This Air France deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” 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 11/124:05 pm
IAH
- LIS
1 stop19h 25m
Multiple Airlines
Mon 11/163:30 pm
LIS
- IAH
1 stop28h 00m
Multiple Airlines
Deal found 2/13![Multiple Airlines logo]()
$537
This Delta deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/225:05 pm
IAH
- LIS
1 stop17h 05m
Delta
Mon 3/3011:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/11![Delta logo]()
$538
This United Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:59 pm
IAH
- LIS
2 stops31h 21m
United Airlines
Thu 11/195:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 2/11![United Airlines logo]()
$539
This United Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:55 pm
IAH
- LIS
2 stops34h 25m
United Airlines
Tue 4/1411:25 am
LIS
- IAH
2 stops34h 24m
United Airlines
Deal found 2/10![United Airlines logo]()
$540
This Delta deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/93:20 pm
IAH
- LIS
1 stop17h 15m
Delta
Wed 4/225:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/10![Delta logo]()
$541
This KLM deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/193:20 pm
IAH
- LIS
1 stop21h 25m
KLM
Tue 4/289:20 am
LIS
- IAH
1 stop33h 55m
KLM
Deal found 2/12![KLM logo]()
$542
This Iberia deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/73:30 pm
IAH
- LIS
1 stop17h 00m
Multiple Airlines
Tue 4/1412:30 pm
LIS
- IAH
2 stops17h 29m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$543
This Finnair deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/133:50 pm
IAH
- LIS
1 stop20h 05m
Multiple Airlines
Tue 11/174:10 pm
LIS
- IAH
2 stops31h 47m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$544
This oojo deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” 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.
Fri 11/131:15 pm
IAH
- LIS
2 stops19h 35m
British Airways
Tue 11/1711:05 am
LIS
- IAH
1 stop16h 20m
British Airways
Deal found 2/13![British Airways logo]()
$545
This Delta deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/123:50 pm
IAH
- LIS
1 stop13h 25m
Delta
Thu 4/2311:55 am
LIS
- IAH
2 stops18h 04m
Delta
Deal found 2/10![Delta logo]()
$546
This KLM deal was found by Cheapflights users on 2/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/83:50 pm
IAH
- OPO
1 stop17h 35m
KLM
Wed 4/157:10 pm
OPO
- IAH
1 stop24h 05m
KLM
Deal found 2/9![KLM logo]()
$550
Best flights from George Bush Intcntl to PortugalDiscover carefully curated flight deals from George Bush Intcntl to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
Discover carefully curated flight deals from George Bush Intcntl to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
This Delta deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:50 pm
IAH
- LIS
1 stop13h 25m
Delta
Sun 4/1911:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/10![Delta logo]()
$536
This KLM deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/73:50 pm
IAH
- LIS
1 stop20h 00m
Multiple Airlines
Tue 4/149:20 am
LIS
- IAH
1 stop33h 55m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$537
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:00 am
IAH
- LIS
2 stops21h 20m
United Airlines
Wed 4/1511:25 am
LIS
- IAH
2 stops32h 12m
United Airlines
Deal found 2/9![United Airlines logo]()
$540
This British Airways deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/93:40 pm
IAH
- LIS
1 stop25h 25m
British Airways
Sat 4/184:25 pm
LIS
- IAH
1 stop32h 45m
British Airways
Deal found 2/10![British Airways logo]()
$561
This KLM deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/104:30 pm
IAH
- OPO
1 stop17h 55m
KLM
Thu 3/2611:20 am
OPO
- IAH
1 stop32h 35m
KLM
Deal found 2/10![KLM logo]()
$576
This Trip.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/145:30 pm
IAH
- OPO
1 stop16h 35m
Lufthansa
Mon 3/2312:30 pm
OPO
- IAH
1 stop31h 40m
Lufthansa
Deal found 2/12![Lufthansa logo]()
$657
This Delta deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/123:50 pm
IAH
- LIS
1 stop20h 00m
Delta
Wed 4/2211:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/10![Delta logo]()
$536
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/167:50 pm
IAH
- OPO
2 stops32h 40m
United Airlines
Tue 3/316:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines logo]()
$552
This British Airways deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/159:05 pm
IAH
- LIS
1 stop20h 10m
British Airways
Wed 4/227:20 am
LIS
- IAH
1 stop17h 55m
British Airways
Deal found 2/10![British Airways logo]()
$561
This Delta deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/93:20 pm
IAH
- LIS
1 stop13h 35m
Delta
Mon 4/2011:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/10![Delta logo]()
$541
This KLM deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/13:20 pm
IAH
- LIS
1 stop21h 25m
KLM
Wed 4/2211:55 am
LIS
- IAH
1 stop31h 20m
KLM
Deal found 2/12![KLM logo]()
$597
This Air France deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/44:59 pm
IAH
- OPO
2 stops16h 26m
Multiple Airlines
Mon 5/1111:25 am
OPO
- IAH
1 stop31h 50m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$604
This British Airways deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1610:45 pm
IAH
- LIS
1 stop30h 05m
British Airways
Wed 3/253:55 pm
LIS
- IAH
1 stop34h 05m
British Airways
Deal found 2/10![British Airways logo]()
$561
This KLM deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/43:50 pm
IAH
- OPO
1 stop17h 35m
KLM
Mon 5/117:00 pm
OPO
- IAH
1 stop24h 15m
KLM
Deal found 2/10![KLM logo]()
$599
This Iberia deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1712:19 pm
IAH
- FNC
2 stops40h 21m
Iberia
Wed 6/241:35 pm
FNC
- IAH
2 stops40h 17m
Iberia
Deal found 2/10![Iberia logo]()
$1,336
This Delta deal was found by Cheapflights users on 2/9. 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.
Mon 3/164:30 pm
IAH
- OPO
1 stop13h 00m
Delta
Tue 3/315:00 am
OPO
- IAH
1 stop14h 15m
Delta
Deal found 2/9![Delta logo]()
$557
This BusinessClass deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/133:20 pm
IAH
- FNC
1 stop36h 20m
Air Europa
Wed 5/2710:25 am
FNC
- IAH
1 stop32h 50m
Air Europa
Deal found 2/12![Air Europa logo]()
$1,464
This Delta deal was found by Cheapflights users on 2/9. 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.
Mon 4/273:50 pm
IAH
- OPO
1 stop17h 35m
Delta
Wed 5/65:00 am
OPO
- IAH
2 stops18h 42m
Delta
Deal found 2/9![Delta logo]()
$560
This Delta deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:50 pm
IAH
- LIS
1 stop20h 00m
Delta
Tue 4/2110:00 am
LIS
- IAH
2 stops18h 54m
Delta
Deal found 2/10![Delta logo]()
$561
This KLM deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/123:20 pm
IAH
- OPO
1 stop21h 00m
KLM
Wed 5/205:00 am
OPO
- IAH
1 stop14h 15m
KLM
Deal found 2/10![KLM logo]()
$680
This Delta deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/313:50 pm
IAH
- OPO
1 stop17h 35m
Delta
Thu 4/95:00 am
OPO
- IAH
2 stops19h 28m
Delta
Deal found 2/12![Delta logo]()
$658
This Mytrip deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:05 am
IAH
- FNC
3 stops45h 10m
Multiple Airlines
Fri 3/201:00 pm
FNC
- IAH
3 stops38h 26m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$1,141
This Expedia deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/134:30 pm
IAH
- FNC
2 stops26h 55m
Lufthansa
Wed 5/2710:45 pm
FNC
- IAH
2 stops23h 45m
Lufthansa
Deal found 2/12![Lufthansa logo]()
$1,281
This FlightHub deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/173:35 pm
IAH
- FNC
1 stop18h 40m
Lufthansa
Wed 6/245:10 pm
FNC
- IAH
1 stop26h 25m
Lufthansa
Deal found 2/10![Lufthansa logo]()
$1,359
This oojo deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:38 pm
IAH
- FNC
2 stops24h 32m
Multiple Airlines
Sun 7/195:35 am
FNC
- IAH
2 stops18h 08m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$1,265
This Mytrip deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:00 am
IAH
- FNC
3 stops23h 35m
Multiple Airlines
Wed 5/275:50 am
FNC
- IAH
2 stops35h 11m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,276
This KAYAK deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:55 pm
IAH
- FNC
2 stops31h 05m
Lufthansa
Fri 3/204:10 am
FNC
- IAH
2 stops25h 20m
Lufthansa
Deal found 2/11![Lufthansa logo]()
$1,446
This oojo deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/172:30 pm
IAH
- FNC
2 stops36h 05m
Multiple Airlines
Wed 6/247:20 pm
FNC
- IAH
2 stops29h 50m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$1,285
Last-minute flights from George Bush Intcntl to PortugalDiscover last-minute flight deals from George Bush Intcntl to Portugal. Data last updated February 13, 2026 and is based on user searches.
Discover last-minute flight deals from George Bush Intcntl to Portugal. Data last updated February 13, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/244:05 pm
IAH
- LIS
1 stop17h 05m
Delta
Tue 3/311:25 am
LIS
- IAH
1 stop32h 05m
Delta
Deal found 2/11![Delta logo]()
$558
This Delta deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Fri 3/65:30 am
LIS
- IAH
1 stop14h 25m
Delta
Deal found 2/11![Delta logo]()
$564
This Delta deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/104:30 pm
IAH
- LIS
1 stop13h 05m
Delta
Tue 3/2411:25 am
LIS
- IAH
1 stop32h 05m
Delta
Deal found 2/10![Delta logo]()
$543
This United Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/147:50 pm
IAH
- LIS
1 stop33h 25m
United Airlines
Wed 3/2511:55 am
LIS
- IAH
1 stop17h 35m
United Airlines
Deal found 2/10![United Airlines logo]()
$563
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/167:50 pm
IAH
- OPO
2 stops32h 40m
United Airlines
Tue 3/316:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines logo]()
$552
This Delta deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/165:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Tue 3/2412:20 pm
LIS
- IAH
2 stops28h 31m
Delta
Deal found 2/10![Delta logo]()
$553
This Delta deal was found by Cheapflights users on 2/9. 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.
Mon 3/164:30 pm
IAH
- OPO
1 stop13h 00m
Delta
Tue 3/315:00 am
OPO
- IAH
1 stop14h 15m
Delta
Deal found 2/9![Delta logo]()
$557
This United Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/169:45 am
IAH
- LIS
2 stops17h 25m
United Airlines
Wed 3/2511:55 am
LIS
- IAH
1 stop17h 35m
United Airlines
Deal found 2/10![United Airlines logo]()
$561
This KLM deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/194:30 pm
IAH
- LIS
1 stop21h 15m
Multiple Airlines
Wed 3/256:30 pm
LIS
- IAH
1 stop25h 25m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$549
This Air France deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/225:05 pm
IAH
- LIS
1 stop17h 05m
Multiple Airlines
Sun 4/127:45 pm
LIS
- IAH
1 stop23h 30m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$536
This Delta deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/225:05 pm
IAH
- LIS
1 stop17h 05m
Delta
Mon 3/3011:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/11![Delta logo]()
$538
This Delta deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/245:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Wed 4/15:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/11![Delta logo]()
$537
One-way flights from George Bush Intcntl to PortugalSearch for one-way flight options from George Bush Intcntl to Portugal. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
Search for one-way flight options from George Bush Intcntl to Portugal. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
This United Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/212:24 pm
IAH
- OPO
1 stop12h 31m
United Airlines
Deal found 2/12![United Airlines logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/119:27 am
IAH
- LIS
3 stops31h 33m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:38 pm
IAH
- OPO
2 stops54h 12m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:35 pm
IAH
- LIS
2 stops43h 20m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/274:30 pm
IAH
- LIS
3 stops41h 45m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:05 am
IAH
- LIS
1 stop22h 35m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:05 am
IAH
- LIS
2 stops28h 05m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$353
This Priceline deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/169:50 am
IAH
- OPO
2 stops28h 45m
British Airways
Deal found 2/12![British Airways logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:38 pm
IAH
- FNC
2 stops48h 37m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$367
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/28:31 pm
IAH
- LIS
3 stops39h 54m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$373
This Trip.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/247:05 am
IAH
- LIS
1 stop16h 20m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:31 pm
IAH
- OPO
3 stops44h 29m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$412
Find flight deals from George Bush Intcntl to Portugal
Keep the following information in mind while searching for George Bush Intcntl to Portugal flight deals. Data was last updated February 13, 2026.
Round-trip from | $536 (Delta) |
|---|---|
One-way from | $280 (United Airlines) |
Popular in | June |
Cheapest in | January |
Average price | $711 |
Cheapflights Fare Finder
Customize your flight search to find flights from George Bush Intcntl 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 February 13, 2026.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Portugal that are best for you.
Fly from
George Bush Intcntl
Fly to
Portugal
Route
Depart
Return
Price
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 4/14
3:50 pm-11:15 am
1 stop13h 25m
Lisbon Humberto Delgado
Sun 4/19
11:55 am-1:15 pm
1 stop31h 20m
$536
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Sun 4/12
3:50 pm-5:50 pm
1 stop20h 00m
Lisbon Humberto Delgado
Wed 4/22
11:55 am-1:15 pm
1 stop31h 20m
$536
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 4/7
3:50 pm-5:50 pm
1 stop20h 00m
Lisbon Humberto Delgado
Tue 4/14
9:20 am-1:15 pm
1 stop33h 55m
$537
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 4/8
6:00 am-9:20 am
2 stops21h 20m
Lisbon Humberto Delgado
Wed 4/15
11:25 am-1:37 pm
2 stops32h 12m
$540
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Thu 4/9
3:20 pm-10:55 am
1 stop13h 35m
Lisbon Humberto Delgado
Mon 4/20
11:55 am-1:15 pm
1 stop31h 20m
$541
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 3/16
7:50 pm-9:30 am
2 stops32h 40m
Porto
Tue 3/31
6:00 am-6:00 pm
1 stop18h 00m
$552
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 3/16
4:30 pm-10:30 am
1 stop13h 00m
Porto
Tue 3/31
5:00 am-1:15 pm
1 stop14h 15m
$557
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 4/27
3:50 pm-3:25 pm
1 stop17h 35m
Porto
Wed 5/6
5:00 am-5:42 pm
2 stops18h 42m
$560
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Thu 4/9
3:40 pm-11:05 pm
1 stop25h 25m
Lisbon Humberto Delgado
Sat 4/18
4:25 pm-7:10 pm
1 stop32h 45m
$561
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Wed 4/15
9:05 pm-11:15 pm
1 stop20h 10m
Lisbon Humberto Delgado
Wed 4/22
7:20 am-7:15 pm
1 stop17h 55m
$561
Showing 1-10 of 47 results
Best time to book a flight from George Bush Intcntl to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from George Bush Intcntl with our price prediction graph.
IAH-LIS
IAH-OPO
IAH-FNC
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston George Bush Intcntl Airport to Portugal
IAH-PT0
IAH-LIS
IAH-OPO
IAH-FNC
What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to Portugal?
Currently, March is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Portugal (average of $476). Flying from Houston George Bush Intcntl Airport to Portugal in June is currently the most expensive (average of $889). 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.
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 February 13, 2026.
Read through reviews of airlines operating flights from Houston George Bush Intcntl Airport to Portugal, such as Delta, Air France, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Crew
8.5
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from George Bush Intcntl 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 George Bush Intcntl to Portugal
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Complete your trip to Portugal by adding a car rental and/or hotel reservation to your travel itinerary.
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George Bush Intcntl and Portugal flights
Browse other George Bush Intcntl and Portugal flight options. Last updated on February 13, 2026.
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Top 8 airlines flying from George Bush Intcntl to Portugal
Discover the top 8 airlines that operate flights from George Bush Intcntl 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 February 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$476 | Average$910 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$540 | Average$840 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$546 | Average$756 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$559 | Average$982 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$590 | Average$1,009 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$621 | Average$726 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$646 | Average$954 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$831 | Average$1,404 | FlexibilityNo cancel fee | On-time76% |