$501+ Cheap flights from Milwaukee (MKE) to Barcelona
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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — BCN
Jun 14 — Jun 211
Round-trip
1 adult, Economy
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Find cheap flights from Milwaukee to Barcelona with Cheapflights
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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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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Milwaukee to Barcelona
Cheapest
Best
Last-minute
One-way
Cheapest flights from Milwaukee to BarcelonaExplore the most affordable flight options available from Milwaukee to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 15, 2026.
Explore the most affordable flight options available from Milwaukee to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 15, 2026.
This American Airlines deal was found by Cheapflights users on 5/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/58:16 pm
MKE
- BCN
2 stops14h 19m
American Airlines
Wed 10/149:15 am
BCN
- MKE
2 stops15h 25m
American Airlines
Deal found 5/10![American Airlines logo]()
$781
This United Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2910:45 am
MKE
- BCN
1 stop19h 30m
United Airlines
Tue 10/612:15 pm
BCN
- MKE
2 stops32h 28m
United Airlines
Deal found 5/14![United Airlines logo]()
$784
This Air Canada deal was found by Cheapflights users on 5/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/295:10 am
MKE
- BCN
2 stops19h 50m
Air Canada
Tue 10/612:15 pm
BCN
- MKE
2 stops28h 34m
Air Canada
Deal found 5/11![Air Canada logo]()
$787
This American Airlines deal was found by Cheapflights users on 5/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:05 am
MKE
- BCN
1 stop18h 30m
American Airlines
Tue 10/612:50 pm
BCN
- MKE
1 stop17h 57m
American Airlines
Deal found 5/10![American Airlines logo]()
$789
This American Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/294:52 pm
MKE
- BCN
1 stop10h 43m
American Airlines
Tue 10/61:30 pm
BCN
- MKE
1 stop16h 27m
American Airlines
Deal found 5/14![American Airlines logo]()
$791
This FlightHub deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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.
Tue 9/294:52 pm
MKE
- BCN
2 stops14h 23m
British Airways
Tue 10/69:45 am
BCN
- MKE
2 stops16h 55m
British Airways
Deal found 5/14![British Airways logo]()
$792
This British Airways deal was found by Cheapflights users on 5/10. 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 9/286:41 pm
MKE
- BCN
2 stops15h 54m
British Airways
Tue 10/610:15 am
BCN
- MKE
2 stops16h 25m
British Airways
Deal found 5/10![British Airways logo]()
$803
This United Airlines deal was found by Cheapflights users on 5/11. 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.
Tue 11/37:00 pm
MKE
- BCN
1 stop11h 10m
United Airlines
Wed 11/2511:00 am
BCN
- MKE
1 stop14h 08m
United Airlines
Deal found 5/11![United Airlines logo]()
$804
This United Airlines deal was found by Cheapflights users on 5/11. 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 11/48:29 am
MKE
- BCN
2 stops17h 31m
United Airlines
Fri 11/2011:00 am
BCN
- MKE
1 stop14h 08m
United Airlines
Deal found 5/11![United Airlines logo]()
$808
This United Airlines deal was found by Cheapflights users on 5/11. 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.
Sat 11/76:45 pm
MKE
- BCN
1 stop30h 35m
United Airlines
Tue 11/243:05 pm
BCN
- MKE
1 stop12h 49m
United Airlines
Deal found 5/11![United Airlines logo]()
$809
This KAYAK deal was found by Cheapflights users on 5/11. 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.
Tue 11/37:00 pm
MKE
- BCN
2 stops15h 35m
Lufthansa
Thu 11/266:50 am
BCN
- MKE
2 stops16h 45m
Lufthansa
Deal found 5/11![Lufthansa logo]()
$820
This American Airlines deal was found by Cheapflights users on 5/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/276:48 pm
MKE
- BCN
2 stops14h 42m
American Airlines
Fri 12/1111:50 am
BCN
- MKE
2 stops18h 40m
American Airlines
Deal found 5/13![American Airlines logo]()
$825
Best flights from Milwaukee to BarcelonaDiscover carefully curated flight deals from Milwaukee to Barcelona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 15, 2026.
Discover carefully curated flight deals from Milwaukee to Barcelona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 15, 2026.
This United Airlines deal was found by Cheapflights users on 5/11. 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.
Tue 9/292:50 pm
MKE
- BCN
1 stop15h 25m
United Airlines
Tue 10/63:15 pm
BCN
- MKE
1 stop14h 09m
United Airlines
Deal found 5/11![United Airlines logo]()
$804
This British Airways deal was found by Cheapflights users on 5/12. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/83:01 pm
MKE
- BCN
2 stops14h 19m
British Airways
Sun 10/187:50 am
BCN
- MKE
2 stops18h 50m
British Airways
Deal found 5/12![British Airways logo]()
$918
This KLM deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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.
Fri 7/37:00 am
MKE
- BCN
1 stop18h 45m
KLM
Wed 7/811:00 am
BCN
- MKE
1 stop19h 56m
KLM
Deal found 5/14![KLM logo]()
$1,046
This Delta deal was found by Cheapflights users on 5/11. 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 7/194:14 pm
MKE
- BCN
1 stop13h 36m
Delta
Sun 7/266:20 am
BCN
- MKE
2 stops18h 56m
Delta
Deal found 5/11![Delta logo]()
$1,051
This United Airlines deal was found by Cheapflights users on 5/10. 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 10/52:50 pm
MKE
- BCN
1 stop15h 25m
United Airlines
Wed 10/143:15 pm
BCN
- MKE
1 stop12h 30m
United Airlines
Deal found 5/10![United Airlines logo]()
$804
This United Airlines deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” 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 7/37:23 pm
MKE
- BCN
1 stop10h 52m
United Airlines
Wed 7/81:15 pm
BCN
- MKE
2 stops36h 33m
United Airlines
Deal found 5/14![United Airlines logo]()
$1,030
Last-minute flights from Milwaukee to BarcelonaDiscover last-minute flight deals from Milwaukee to Barcelona. Data last updated May 15, 2026 and is based on user searches.
Discover last-minute flight deals from Milwaukee to Barcelona. Data last updated May 15, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:40 pm
MKE
- BCN
1 stop32h 55m
American Airlines
Wed 5/2710:30 am
BCN
- MKE
1 stop17h 34m
American Airlines
Deal found 5/12![American Airlines logo]()
$1,202
This Air Canada deal was found by Cheapflights users on 5/12. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1410:50 am
MKE
- BCN
2 stops14h 10m
Multiple Airlines
Wed 5/2712:15 pm
BCN
- MKE
2 stops18h 19m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$1,209
This Iberia deal was found by Cheapflights users on 5/12. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/141:53 pm
MKE
- BCN
2 stops21h 17m
Iberia
Wed 5/2710:30 am
BCN
- MKE
1 stop16h 27m
Iberia
Deal found 5/12![Iberia logo]()
$1,221
This KAYAK deal was found by Cheapflights users on 5/11. 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.
Sat 5/237:15 pm
MKE
- BCN
2 stops32h 50m
Lufthansa
Wed 6/312:40 pm
BCN
- MKE
2 stops16h 41m
Lufthansa
Deal found 5/11![Lufthansa logo]()
$1,351
This KAYAK deal was found by Cheapflights users on 5/11. 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.
Sat 5/237:15 pm
MKE
- BCN
2 stops32h 50m
Lufthansa
Mon 6/17:00 pm
BCN
- MKE
2 stops28h 46m
Lufthansa
Deal found 5/11![Lufthansa logo]()
$1,371
This KAYAK deal was found by Cheapflights users on 5/11. 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.
Sun 5/241:30 pm
MKE
- BCN
2 stops21h 25m
Lufthansa
Tue 6/210:15 am
BCN
- MKE
2 stops19h 14m
Lufthansa
Deal found 5/11![Lufthansa logo]()
$1,345
This KAYAK deal was found by Cheapflights users on 5/11. 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.
Sun 5/247:15 pm
MKE
- BCN
2 stops15h 40m
Lufthansa
Mon 6/17:00 pm
BCN
- MKE
2 stops28h 46m
Lufthansa
Deal found 5/11![Lufthansa logo]()
$1,366
This Air Canada deal was found by Cheapflights users on 5/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:35 am
MKE
- BCN
2 stops16h 25m
Multiple Airlines
Wed 6/31:50 pm
BCN
- MKE
3 stops39h 31m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$1,321
This Air Canada deal was found by Cheapflights users on 5/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:30 am
MKE
- BCN
3 stops17h 30m
Air Canada
Wed 6/31:50 pm
BCN
- MKE
3 stops39h 31m
Air Canada
Deal found 5/11![Air Canada logo]()
$1,329
This Travelocity deal was found by Cheapflights users on 5/9. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/308:41 am
MKE
- BCN
1 stop18h 04m
JetBlue
Sat 6/1312:50 pm
BCN
- MKE
1 stop26h 56m
JetBlue
Deal found 5/9![JetBlue logo]()
$1,309
This Expedia deal was found by Cheapflights users on 5/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/98:41 am
MKE
- BCN
2 stops17h 49m
Multiple Airlines
Mon 6/158:00 am
BCN
- MKE
2 stops31h 46m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$1,338
One-way flights from Milwaukee to BarcelonaSearch for one-way flight options from Milwaukee to Barcelona. Find affordable one-way fares based on user searches. Data last updated May 15, 2026.
Search for one-way flight options from Milwaukee to Barcelona. Find affordable one-way fares based on user searches. Data last updated May 15, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/10. 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.
Sat 8/112:10 pm
MKE
- BCN
3 stops49h 25m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$501
This Cheapflightsfares deal was found by Cheapflights users on 5/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/19:36 am
MKE
- BCN
1 stop17h 09m
JetBlue
Deal found 5/10![JetBlue logo]()
$508
This KAYAK deal was found by Cheapflights users on 5/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/11:44 pm
MKE
- BCN
2 stops37h 36m
Aer Lingus
Deal found 5/10![Aer Lingus logo]()
$541
This KAYAK deal was found by Cheapflights users on 5/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/17:00 pm
MKE
- BCN
1 stop32h 55m
British Airways
Deal found 5/10![British Airways logo]()
$565
This Booking.com deal was found by Cheapflights users on 5/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/13:37 pm
MKE
- BCN
2 stops34h 28m
British Airways
Deal found 5/10![British Airways logo]()
$768
This KLM deal was found by Cheapflights users on 5/10. 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 11/17:00 am
MKE
- BCN
1 stop18h 35m
KLM
Deal found 5/10![KLM logo]()
$1,004
This Kiwi.com deal was found by Cheapflights users on 5/10. 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.
Sun 11/14:44 pm
MKE
- BCN
3 stops47h 51m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$1,205
Find flight deals from Milwaukee to Barcelona
Discover tips and strategies to find the most affordable flight options for your journey from Milwaukee (MKE) to Barcelona (S37). 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 May 15, 2026.
Round-trip from | $781 (American Airlines) |
|---|---|
One-way from | $501 (Kiwi.com) |
Popular in | June |
Cheapest in | November |
Average price | $1,483 |
Cheapflights Fare Finder
Customize your flight search to find flights from Milwaukee to Barcelona 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 May 15, 2026.
Use the filters below to find and compare flights from Milwaukee to Barcelona that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Tue 9/29
2:50 pm-1:15 pm
1 stop15h 25m
Barcelona-El Prat
Tue 10/6
3:15 pm-10:24 pm
1 stop14h 09m
$804
Quickest round-trip
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Mon 10/5
2:50 pm-1:15 pm
1 stop15h 25m
Barcelona-El Prat
Wed 10/14
3:15 pm-8:45 pm
1 stop12h 30m
$804
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Thu 10/8
3:01 pm-12:20 pm
2 stops14h 19m
Barcelona-El Prat
Sun 10/18
7:50 am-7:40 pm
2 stops18h 50m
$918
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Fri 7/3
7:23 pm-1:15 pm
1 stop10h 52m
Barcelona-El Prat
Wed 7/8
1:15 pm-6:48 pm
2 stops36h 33m
$1,030
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Fri 7/3
7:00 am-8:45 am
1 stop18h 45m
Barcelona-El Prat
Wed 7/8
11:00 am-11:56 pm
1 stop19h 56m
$1,046
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Sun 7/19
4:14 pm-12:50 pm
1 stop13h 36m
Barcelona-El Prat
Sun 7/26
6:20 am-6:16 pm
2 stops18h 56m
$1,051
Cheapest one-way
Quickest one-way
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Sat 8/1
9:36 am-9:45 am
1 stop17h 09m
$508
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Sat 8/1
1:44 pm-10:20 am
2 stops37h 36m
$541
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Sat 8/1
7:00 pm-10:55 am
1 stop32h 55m
$565
MilwaukeeBarcelona
MKE - BCN
MKEBCN
Milwaukee-Mitchell
Sun 11/1
7:00 am-8:35 am
1 stop18h 35m
$1,004
Showing 1-10 of 11 resultsSorted by cheapest first
Best time to book a flight from Milwaukee to Barcelona
Have a flexible travel schedule? Discover the best time to fly to Barcelona from Milwaukee with our price prediction graph.
MKE-S37
MKE-BCN
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 Milwaukee to Barcelona
MKE-S37
MKE-BCN
How much does it cost to fly round-trip from Milwaukee to Barcelona?
Reviews of airlines servicing Barcelona
Get insights into the airlines that provide service to Barcelona. 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 Barcelona. Reviews last updated May 15, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines from Milwaukee to Barcelona by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from Milwaukee to Barcelona. 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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Milwaukee and Barcelona flights
Browse other Milwaukee and Barcelona flight options. Last updated on May 15, 2026.
Other flights from Milwaukee
Browse through other flights departing from Milwaukee. Flights are based on user searches made on Cheapflights and were last updated on May 15, 2026.
Popular flight searches
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Top 4 airlines flying from Milwaukee to Barcelona
Discover the top 4 airlines that operate flights from Milwaukee to Barcelona. 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 May 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$457 | Average$698 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$499 | Average$808 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$609 | Average$775 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$689 | Average$989 | FlexibilityNo cancel fee | On-timeN/A |