$581+ Cheap flights from Milwaukee (MKE) to Porto (OPO)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — OPO
May 30 — Jun 61
Round-trip
1 adult, Economy
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Find cheap flights from Milwaukee to Porto with Cheapflights
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Cheapest flights from Milwaukee to PortoExplore the most affordable flight options available from Milwaukee to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2026.
Explore the most affordable flight options available from Milwaukee to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2026.
This United Airlines deal was found by Cheapflights users on 4/29. 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 11/1611:10 am
MKE
- OPO
1 stop16h 20m
United Airlines
Wed 11/1812:30 pm
OPO
- MKE
2 stops17h 39m
United Airlines
Deal found 4/29![United Airlines logo]()
$746
This Iberia deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 9/226:41 pm
MKE
- OPO
2 stops19h 19m
Iberia
Sun 9/278:40 pm
OPO
- MKE
2 stops26h 53m
Iberia
Deal found 4/26![Iberia logo]()
$1,008
This Air France deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/55:05 pm
MKE
- OPO
2 stops16h 20m
Multiple Airlines
Tue 5/265:00 am
OPO
- MKE
2 stops18h 55m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$1,079
This Air France deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/55:05 pm
MKE
- OPO
2 stops16h 20m
Air France
Tue 5/261:05 pm
OPO
- MKE
1 stop14h 50m
Air France
Deal found 4/27![Air France logo]()
$1,086
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 9/112:45 pm
MKE
- OPO
2 stops13h 45m
Delta
Sat 9/195:00 am
OPO
- MKE
2 stops21h 09m
Delta
Deal found 4/26![Delta logo]()
$1,101
This Air France deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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.
Fri 9/115:55 pm
MKE
- OPO
2 stops15h 30m
Air France
Sat 9/196:10 am
OPO
- MKE
2 stops19h 59m
Air France
Deal found 4/27![Air France logo]()
$1,108
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:00 am
MKE
- OPO
2 stops19h 10m
United Airlines
Sat 9/1212:20 pm
OPO
- MKE
2 stops16h 16m
United Airlines
Deal found 4/26![United Airlines logo]()
$1,123
Best flights from Milwaukee to PortoDiscover carefully curated flight deals from Milwaukee to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 30, 2026.
Discover carefully curated flight deals from Milwaukee to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 30, 2026.
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 9/117:00 am
MKE
- OPO
1 stop21h 30m
Delta
Sat 9/195:00 am
OPO
- MKE
2 stops21h 09m
Delta
Deal found 4/26![Delta logo]()
$1,102
This Air France deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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.
Fri 9/115:55 pm
MKE
- OPO
2 stops15h 30m
Air France
Sat 9/196:10 am
OPO
- MKE
2 stops19h 59m
Air France
Deal found 4/27![Air France logo]()
$1,108
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:00 am
MKE
- OPO
2 stops19h 10m
United Airlines
Sat 9/1212:20 pm
OPO
- MKE
2 stops16h 16m
United Airlines
Deal found 4/26![United Airlines logo]()
$1,123
This Air France deal was found by Cheapflights users on 4/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:01 pm
MKE
- OPO
2 stops16h 24m
Multiple Airlines
Tue 5/2611:30 am
OPO
- MKE
2 stops18h 23m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$1,193
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/155:48 pm
MKE
- OPO
2 stops15h 37m
Delta
Tue 5/265:00 am
OPO
- MKE
2 stops21h 28m
Delta
Deal found 4/26![Delta logo]()
$1,193
This Air France deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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.
Fri 5/155:01 pm
MKE
- OPO
2 stops16h 24m
Air France
Tue 5/261:05 pm
OPO
- MKE
1 stop14h 50m
Air France
Deal found 4/25![Air France logo]()
$1,200
Last-minute flights from Milwaukee to PortoDiscover last-minute flight deals from Milwaukee to Porto. Data last updated April 30, 2026 and is based on user searches.
Discover last-minute flight deals from Milwaukee to Porto. Data last updated April 30, 2026 and is based on user searches.
This Air France deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/55:05 pm
MKE
- OPO
2 stops16h 20m
Multiple Airlines
Tue 5/265:00 am
OPO
- MKE
2 stops18h 55m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$1,079
This Air France deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/55:05 pm
MKE
- OPO
2 stops16h 20m
Air France
Tue 5/261:05 pm
OPO
- MKE
1 stop14h 50m
Air France
Deal found 4/27![Air France logo]()
$1,086
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/510:50 am
MKE
- OPO
1 stop16h 55m
United Airlines
Tue 5/2612:35 pm
OPO
- MKE
1 stop16h 59m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,598
This Air France deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/115:01 pm
MKE
- OPO
2 stops16h 24m
Multiple Airlines
Thu 5/145:00 am
OPO
- MKE
2 stops19h 03m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$1,398
This Ovago deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1110:50 am
MKE
- OPO
1 stop16h 55m
Lufthansa
Thu 5/1412:10 pm
OPO
- MKE
2 stops16h 23m
Lufthansa
Deal found 4/27![Lufthansa logo]()
$1,626
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:48 pm
MKE
- OPO
2 stops15h 37m
Delta
Tue 5/265:00 am
OPO
- MKE
2 stops22h 02m
Delta
Deal found 4/29![Delta logo]()
$1,193
This KAYAK deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” 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 5/1510:50 am
MKE
- OPO
1 stop16h 55m
Lufthansa
Tue 5/269:00 am
OPO
- MKE
1 stop15h 26m
Lufthansa
Deal found 4/25![Lufthansa logo]()
$2,860
One-way flights from Milwaukee to PortoSearch for one-way flight options from Milwaukee to Porto. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
Search for one-way flight options from Milwaukee to Porto. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Fri 9/41:00 pm
MKE
- OPO
3 stops47h 00m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$581
This Delta deal was found by Cheapflights users on 4/28. 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.
Fri 9/1112:20 pm
MKE
- OPO
2 stops16h 10m
Delta
Deal found 4/28![Delta logo]()
$595
This Air France deal was found by Cheapflights users on 4/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/910:22 am
MKE
- OPO
2 stops16h 08m
Air France
Deal found 4/28![Air France logo]()
$652
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Fri 9/116:41 pm
MKE
- OPO
3 stops39h 09m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$660
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:41 pm
MKE
- OPO
1 stop33h 04m
United Airlines
Deal found 4/28![United Airlines logo]()
$723
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/145:01 pm
MKE
- OPO
2 stops16h 24m
Delta
Deal found 4/26![Delta logo]()
$736
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Sat 5/911:13 am
MKE
- OPO
3 stops45h 12m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$759
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/1410:50 am
MKE
- OPO
1 stop16h 55m
United Airlines
Deal found 4/26![United Airlines logo]()
$1,107
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:41 pm
MKE
- OPO
1 stop33h 04m
United Airlines
Deal found 4/26![United Airlines logo]()
$1,128
This KAYAK deal was found by Cheapflights users on 4/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:00 am
MKE
- OPO
1 stop18h 50m
Lufthansa
Deal found 4/28![Lufthansa logo]()
$1,183
Find flight deals from Milwaukee to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Milwaukee (MKE) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,008 (Iberia) |
One-way from | $581 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Milwaukee to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 30, 2026.
Use the filters below to find and compare flights from Milwaukee to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Fri 9/11
7:00 am-10:30 am
1 stop21h 30m
Porto
Sat 9/19
5:00 am-8:09 pm
2 stops21h 09m
$1,102
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Fri 9/11
5:55 pm-3:25 pm
2 stops15h 30m
Porto
Sat 9/19
6:10 am-8:09 pm
2 stops19h 59m
$1,108
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Fri 9/4
6:00 am-7:10 am
2 stops19h 10m
Porto
Sat 9/12
12:20 pm-10:36 pm
2 stops16h 16m
$1,123
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Fri 5/15
5:01 pm-3:25 pm
2 stops16h 24m
Porto
Tue 5/26
11:30 am-11:53 pm
2 stops18h 23m
$1,193
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Fri 5/15
5:48 pm-3:25 pm
2 stops15h 37m
Porto
Tue 5/26
5:00 am-8:28 pm
2 stops21h 28m
$1,193
Quickest round-trip
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Fri 5/15
5:01 pm-3:25 pm
2 stops16h 24m
Porto
Tue 5/26
1:05 pm-9:55 pm
1 stop14h 50m
$1,200
Cheapest one-way
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Fri 9/11
12:20 pm-10:30 am
2 stops16h 10m
$595
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Sat 5/9
6:41 pm-9:45 am
1 stop33h 04m
$723
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Thu 5/14
10:50 am-9:45 am
1 stop16h 55m
$1,107
MilwaukeePorto
MKE - OPO
MKEOPO
Milwaukee-Mitchell
Fri 5/15
6:41 pm-9:45 am
1 stop33h 04m
$1,128
Showing 1-10 of 12 resultsSorted by cheapest first
- Most accurate provider: When it comes to deals on Milwaukee-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Milwaukee-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Milwaukee-Porto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Milwaukee-Porto flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Milwaukee-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Milwaukee to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from Milwaukee with our price prediction graph.
MKE-OPO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Related info for your journey
Find useful and relevant information for your journey from Milwaukee to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra
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