$303+ 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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LIS
Mar 12 — Mar 191
1 adult, Economy
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Find cheap flights from George Bush Intcntl to Portugal 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 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 10, 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 10, 2026.
This Delta deal was found by Cheapflights users on 2/7. 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 4/83:50 pm
IAH
- LIS
1 stop17h 05m
Delta
Tue 4/1411:55 am
LIS
- IAH
1 stop31h 20m
Delta
Deal found 2/7![Delta logo]()
$536
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.
Tue 3/245:05 pm
IAH
- LIS
1 stop19h 25m
Multiple Airlines
Mon 3/3011:55 am
LIS
- IAH
1 stop31h 20m
Multiple Airlines
Deal found 2/10![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 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 2/9![United Airlines logo]()
$538
This Gotogate deal was found by Cheapflights users on 2/8. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:10 pm
IAH
- LIS
1 stop15h 10m
Multiple Airlines
Tue 11/105:00 am
LIS
- IAH
2 stops23h 44m
Multiple Airlines
Deal found 2/8![Multiple 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 United Airlines deal was found by Cheapflights users on 2/8. 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 3/177:25 am
IAH
- LIS
1 stop21h 50m
United Airlines
Tue 3/245:00 am
LIS
- IAH
2 stops21h 44m
United Airlines
Deal found 2/8![United Airlines logo]()
$543
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/165:30 pm
IAH
- OPO
1 stop13h 10m
Lufthansa
Tue 3/3112:05 pm
OPO
- IAH
1 stop31h 30m
Lufthansa
Deal found 2/9![Lufthansa logo]()
$543
This Delta deal was found by Cheapflights users on 2/7. 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 4/73:50 pm
IAH
- LIS
1 stop13h 25m
Delta
Tue 4/145:00 am
LIS
- IAH
2 stops19h 33m
Delta
Deal found 2/7![Delta logo]()
$546
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.
Tue 3/174:55 pm
IAH
- OPO
1 stop11h 35m
United Airlines
Wed 4/16:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines logo]()
$548
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 3/185:05 pm
IAH
- OPO
1 stop12h 25m
KLM
Wed 4/17:10 pm
OPO
- IAH
1 stop24h 05m
KLM
Deal found 2/9![KLM logo]()
$550
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.
Tue 3/175:05 pm
IAH
- OPO
1 stop12h 25m
Delta
Mon 3/3011:25 am
OPO
- IAH
1 stop31h 50m
Delta
Deal found 2/9![Delta logo]()
$551
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
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 10, 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 10, 2026.
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 4/155:05 am
LIS
- IAH
1 stop18h 55m
United Airlines
Deal found 2/9![United Airlines logo]()
$538
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
This Delta deal was found by Cheapflights users on 2/7. 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 4/83:50 pm
IAH
- OPO
1 stop17h 35m
Delta
Wed 4/155:00 am
OPO
- IAH
1 stop14h 15m
Delta
Deal found 2/7![Delta logo]()
$550
This Mytrip deal was found by Cheapflights users on 2/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/43:37 pm
IAH
- FNC
3 stops19h 33m
Multiple Airlines
Tue 3/107:50 am
FNC
- IAH
3 stops20h 19m
Multiple Airlines
Deal found 2/7![Multiple Airlines logo]()
$844
This United Airlines deal was found by Cheapflights users on 2/8. 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 3/177:25 am
IAH
- LIS
1 stop21h 50m
United Airlines
Tue 3/245:00 am
LIS
- IAH
2 stops21h 44m
United Airlines
Deal found 2/8![United Airlines logo]()
$543
This KLM deal was found by Cheapflights users on 2/7. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/73:50 pm
IAH
- OPO
1 stop17h 35m
KLM
Wed 4/155:00 am
OPO
- IAH
1 stop14h 15m
KLM
Deal found 2/7![KLM logo]()
$550
This Delta deal was found by Cheapflights users on 2/7. 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 4/83:50 pm
IAH
- OPO
1 stop17h 35m
Delta
Thu 4/165:00 am
OPO
- IAH
1 stop14h 15m
Delta
Deal found 2/7![Delta logo]()
$550
This KAYAK deal was found by Cheapflights users on 2/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/84:47 pm
IAH
- FNC
1 stop32h 18m
Lufthansa
Wed 6/179:40 am
FNC
- IAH
1 stop17h 11m
Lufthansa
Deal found 2/8![Lufthansa logo]()
$1,159
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.
Mon 4/273:50 pm
IAH
- OPO
1 stop17h 35m
KLM
Wed 5/67:10 pm
OPO
- IAH
1 stop24h 05m
KLM
Deal found 2/9![KLM logo]()
$550
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.
Wed 3/185:05 pm
IAH
- OPO
1 stop12h 25m
Delta
Mon 3/3011:25 am
OPO
- IAH
1 stop31h 50m
Delta
Deal found 2/9![Delta logo]()
$551
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 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.
Tue 3/172:45 pm
IAH
- OPO
2 stops13h 45m
United Airlines
Thu 4/26:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines 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.
Tue 3/177:05 am
IAH
- OPO
2 stops22h 25m
Delta
Tue 3/3111:30 am
OPO
- IAH
1 stop31h 45m
Delta
Deal found 2/9![Delta logo]()
$554
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 4/13:20 pm
IAH
- LIS
1 stop13h 35m
KLM
Wed 4/227:45 pm
LIS
- IAH
1 stop23h 30m
KLM
Deal found 2/9![KLM logo]()
$596
This Delta deal was found by Cheapflights users on 2/8. 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 3/185:05 pm
IAH
- OPO
1 stop12h 25m
Delta
Wed 4/15:00 am
OPO
- IAH
2 stops19h 28m
Delta
Deal found 2/8![Delta logo]()
$559
This United Airlines deal was found by Cheapflights users on 2/7. 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.
Sat 3/77:50 pm
IAH
- LIS
1 stop32h 25m
United Airlines
Mon 3/1610:15 am
LIS
- IAH
2 stops17h 25m
United Airlines
Deal found 2/7![United Airlines logo]()
$567
This KLM deal was found by Cheapflights users on 2/7. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/63:20 pm
IAH
- LIS
1 stop17h 15m
KLM
Mon 5/117:45 pm
LIS
- IAH
1 stop23h 30m
KLM
Deal found 2/7![KLM logo]()
$596
This Delta deal was found by Cheapflights users on 2/7. 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 4/73:50 pm
IAH
- OPO
1 stop17h 35m
Delta
Tue 4/145:00 am
OPO
- IAH
2 stops23h 54m
Delta
Deal found 2/7![Delta logo]()
$559
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Sun 4/57:30 am
IAH
- LIS
1 stop21h 00m
United Airlines
Thu 4/305:05 am
LIS
- IAH
1 stop18h 55m
United Airlines
Deal found 2/8![United Airlines logo]()
$590
This Delta deal was found by Cheapflights users on 2/8. 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.
Sun 3/225:05 pm
IAH
- LIS
1 stop19h 25m
Delta
Thu 4/95:00 am
LIS
- IAH
1 stop14h 15m
Delta
Deal found 2/8![Delta logo]()
$591
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.
Sun 4/57:30 am
IAH
- LIS
1 stop21h 00m
United Airlines
Wed 4/225:05 am
LIS
- IAH
2 stops23h 30m
United Airlines
Deal found 2/9![United Airlines logo]()
$600
This KLM deal was found by Cheapflights users on 2/8. 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.
Tue 5/53:20 pm
IAH
- FNC
1 stop35h 55m
KLM
Sun 5/106:40 pm
FNC
- IAH
1 stop24h 35m
KLM
Deal found 2/8![KLM logo]()
$717
This Delta deal was found by Cheapflights users on 2/8. 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 3/235:05 pm
IAH
- LIS
1 stop19h 25m
Delta
Fri 4/105:00 am
LIS
- IAH
2 stops24h 28m
Delta
Deal found 2/8![Delta logo]()
$601
This Delta deal was found by Cheapflights users on 2/8. 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.
Sun 3/225:05 pm
IAH
- LIS
1 stop13h 15m
Delta
Fri 4/105:00 am
LIS
- IAH
2 stops24h 28m
Delta
Deal found 2/8![Delta logo]()
$601
This Mytrip deal was found by Cheapflights users on 2/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/810:00 am
IAH
- FNC
3 stops33h 25m
Multiple Airlines
Wed 6/177:20 pm
FNC
- IAH
3 stops30h 18m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$1,179
This Delta deal was found by Cheapflights users on 2/7. 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.
Sun 4/53:50 pm
IAH
- LIS
1 stop13h 25m
Delta
Wed 4/155:00 am
LIS
- IAH
2 stops18h 42m
Delta
Deal found 2/7![Delta logo]()
$601
This Mytrip deal was found by Cheapflights users on 2/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:00 pm
IAH
- FNC
3 stops26h 40m
Multiple Airlines
Sun 5/107:25 pm
FNC
- IAH
2 stops33h 26m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$1,267
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/153:55 pm
IAH
- FNC
3 stops35h 05m
Multiple Airlines
Sun 3/222:45 pm
FNC
- IAH
3 stops34h 25m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$1,302
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Mon 6/810:10 pm
IAH
- FNC
2 stops26h 55m
United Airlines
Wed 6/179:40 am
FNC
- IAH
1 stop15h 06m
United Airlines
Deal found 2/8![United Airlines logo]()
$1,104
Last-minute flights from George Bush Intcntl to PortugalDiscover last-minute flight deals from George Bush Intcntl to Portugal. Data last updated February 10, 2026 and is based on user searches.
Discover last-minute flight deals from George Bush Intcntl to Portugal. Data last updated February 10, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/7. 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.
Wed 2/1811:55 am
IAH
- LIS
1 stop14h 15m
United Airlines
Tue 2/245:00 am
LIS
- IAH
1 stop19h 15m
United Airlines
Deal found 2/7![United Airlines logo]()
$555
This KAYAK deal was found by Cheapflights users on 2/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/114:30 pm
IAH
- LIS
1 stop17h 05m
Air Europa
Mon 3/165:00 am
LIS
- IAH
2 stops22h 59m
Air Europa
Deal found 2/7![Air Europa logo]()
$553
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/165:30 pm
IAH
- OPO
1 stop13h 10m
Lufthansa
Tue 3/3112:05 pm
OPO
- IAH
1 stop31h 30m
Lufthansa
Deal found 2/9![Lufthansa logo]()
$543
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 2/9. 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
Wed 4/111:45 am
OPO
- IAH
1 stop31h 30m
Delta
Deal found 2/9![Delta logo]()
$556
This United Airlines deal was found by Cheapflights users on 2/8. 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 3/177:25 am
IAH
- LIS
1 stop21h 50m
United Airlines
Tue 3/245:00 am
LIS
- IAH
2 stops21h 44m
United Airlines
Deal found 2/8![United Airlines logo]()
$543
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.
Tue 3/174:55 pm
IAH
- OPO
1 stop11h 35m
United Airlines
Wed 4/16:00 am
OPO
- IAH
1 stop18h 00m
United Airlines
Deal found 2/9![United Airlines logo]()
$548
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.
Tue 3/175:05 pm
IAH
- OPO
1 stop12h 25m
Delta
Mon 3/3011:25 am
OPO
- IAH
1 stop31h 50m
Delta
Deal found 2/9![Delta logo]()
$551
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 3/185:05 pm
IAH
- OPO
1 stop12h 25m
KLM
Wed 4/17:10 pm
OPO
- IAH
1 stop24h 05m
KLM
Deal found 2/9![KLM logo]()
$550
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.
Wed 3/187:05 am
IAH
- OPO
2 stops22h 25m
Delta
Tue 3/3111:30 am
OPO
- IAH
1 stop31h 45m
Delta
Deal found 2/9![Delta logo]()
$554
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 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.
Tue 3/245:05 pm
IAH
- LIS
1 stop19h 25m
Multiple Airlines
Mon 3/3011:55 am
LIS
- IAH
1 stop31h 20m
Multiple Airlines
Deal found 2/10![Multiple Airlines 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 10, 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 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3011:15 am
IAH
- LIS
3 stops45h 45m
Multiple Airlines
Deal found 2/7![Multiple Airlines logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 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 2/7![Multiple Airlines logo]()
$318
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 2/9. 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 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 2/9![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/198:31 pm
IAH
- OPO
3 stops45h 19m
Multiple Airlines
Deal found 2/7![Multiple Airlines logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 2/6. 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.
Sat 7/188:13 pm
IAH
- LIS
2 stops45h 42m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 2/8. 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.
Thu 3/127:19 pm
IAH
- LIS
2 stops56h 46m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 2/8. 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.
Tue 2/176:00 am
IAH
- LIS
3 stops26h 30m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 2/8. 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.
Fri 4/311:15 am
IAH
- LIS
2 stops40h 20m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 2/8. 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.
Fri 4/311:15 am
IAH
- OPO
3 stops40h 25m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 2/8. 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.
Tue 4/77:00 am
IAH
- OPO
3 stops32h 15m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$368
This Kiwi.com deal was found by Cheapflights users on 2/8. 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.
Thu 4/95:20 am
IAH
- OPO
3 stops46h 05m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$374
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 10, 2026.
Round-trip from | $536 (Delta) |
|---|---|
One-way from | $303 (Kiwi.com) |
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 10, 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
Wed 4/8
6:00 am-9:20 am
2 stops21h 20m
Lisbon Humberto Delgado
Wed 4/15
5:05 am-6:00 pm
1 stop18h 55m
$538
HoustonLisbon
IAH - LIS
IAHLIS
Houston George Bush Intcntl
Tue 3/17
7:25 am-10:15 am
1 stop21h 50m
Lisbon Humberto Delgado
Tue 3/24
5:00 am-9:44 pm
2 stops21h 44m
$543
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 4/8
3:50 pm-3:25 pm
1 stop17h 35m
Porto
Wed 4/15
7:10 pm-1:15 pm
1 stop24h 05m
$550
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 4/8
3:50 pm-3:25 pm
1 stop17h 35m
Porto
Wed 4/15
5:00 am-1:15 pm
1 stop14h 15m
$550
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 4/7
3:50 pm-3:25 pm
1 stop17h 35m
Porto
Wed 4/15
5:00 am-1:15 pm
1 stop14h 15m
$550
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 4/8
3:50 pm-3:25 pm
1 stop17h 35m
Porto
Thu 4/16
5:00 am-1:15 pm
1 stop14h 15m
$550
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 4/27
3:50 pm-3:25 pm
1 stop17h 35m
Porto
Wed 5/6
7:10 pm-1:15 pm
1 stop24h 05m
$550
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 3/18
5:05 pm-10:30 am
1 stop12h 25m
Porto
Mon 3/30
11:25 am-1:15 pm
1 stop31h 50m
$551
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
Tue 3/17
2:45 pm-9:30 am
2 stops13h 45m
Porto
Thu 4/2
6:00 am-6:00 pm
1 stop18h 00m
$553
Showing 1-10 of 50 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 10, 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
Crew
8.5
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.9
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
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Alternative routes for George Bush Intcntl to Portugal
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Complete your trip
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 10, 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 10, 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% |