Find Cheap Flights from Ontario to Milwaukee-Mitchell (ONT - MKE)

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Sat 11/18
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Good to Know

Average Price:
$414
(avg. price over the last 2 weeks)
Good Deal:
$308
or less (round trip)

When to Book Flights from Ontario to Milwaukee-Mitchell

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

When looking for a cheap flight, consider that 25% of our users selected a flight on this route for $308 or less.
The cheapest flight from Ontario to Milwaukee-Mitchell was found 44 days before departure, on average.
Book at least 1 week before departure in order to get a below-average price.
Morning departure is around 21% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Ontario to Milwaukee-Mitchell Flights

How long does a flight from Ontario to Milwaukee-Mitchell take?
An average nonstop flight takes 5h 28m, covering a distance of 1709 miles.
Which airlines provide the cheapest flights from Ontario to Milwaukee-Mitchell?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($180), Multiple Airlines ($269) and American Airlines ($314).
Do I need a passport to fly between Ontario and Milwaukee-Mitchell?
No.
What’s the cheapest day of the week to fly Ontario to Milwaukee-Mitchell?
For Ontario to Milwaukee-Mitchell, Monday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Milwaukee-Mitchell back to Ontario, the best deals are generally found on Friday, with Wednesday being the most expensive.

Book cheap flights from Ontario to Milwaukee-Mitchell (round-trip)

Airports
Origin
Ontario
$180
only
$180
Destination
Milwaukee
$180
only
$180
Mon, Dec 4
ONT
MKE
32h 37m
Fri, Dec 8
MKE
ONT
17h 08m
Trip: 5 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32923 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
SLC
Okay 5.6

Food, entertainment NA, didn’t use. Rest of flight uneventful, happy to say. Because this was so late due to previous leg of journey delayed, our planned transportation to hotel wa not available.

MIA
CVG
Good 6.0

More snack/food options

MIA
ISP
Excellent 8.5

The terminal was empty. Plenty of seats. Boarding doesn't take long. Arrival at ISP is nice because it is small and empty.

MCO
DEN
Okay 4.6

The seats were clean; the cabin looked very nice. The plane got me from point A to B safely. smoothest Lansing ever!

Flight was delayed 2.5 hours. No communication from the cockpit, 2 out of the 4 flight attendants we really crabby. Undersea storage was unusually small. I’m 5’8” and my knees were pressed against the seat in front of me and the seats are hard. My legs were numb for part of the trip.

DEN
ORD
Excellent 10.0

On time. Very organized.

Thu, Nov 23
ONT
MKE
21h 07m
Mon, Nov 27
MKE
ONT
22h 54m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Feb 2
ONT
MKE
6h 14m
Sun, Feb 4
MKE
ONT
6h 32m
Trip: 3 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 25178 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
LAX
MIA
Good 7.6

Movies, clean, efficient

Paying of my small Checked bag

SAL
MIA
Excellent 8.6

There was no individual entertainment on board (TV’s, internet, etc)

FAT
DFW
Excellent 10.0

Nice amount of leg room!!!

Nothing

DCA
CLE
Okay 5.0

American Airlines flying out of DCA is highly disorganized. I will look to fly to Washington-Dulles next time, or just avoid American Airlines altogether.

LAX
RNO
Mediocre 2.0

Not a single part has a positive remark

Well - this partner of westjet was terrible. The amount of re direction to get to the final terminal was absurd .. that's just my venting My real problem is that then "crew" or team that represent s the American Airlines / compass part was just useless. A hand full of people - myself included didn't get a chance to board the plane as they didn't make any announcements. Beyond disappointing. When you check in they take your cell phone "in case " well no call no txt no nothing. It was a joke the level of service No apologies or anything just a group of any tired patrons getting the worst customer experience. I'll never EVER book a flight that has anything to do with American Airlines or its partners

Sat, May 26
ONT
MKE
7h 50m
Sun, May 27
MKE
ONT
5h 29m
Trip: 2 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 51141 reviews
Overall
7.2
Boarding
7.3
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
SJC
EWR
Mediocre 3.6

Arrived on time

Narrow seat

DEN
LGA
Excellent 8.3

The crew did a good job with the sick woman.

NRT
LAX
Excellent 10.0

Service and food were great. Flight was smooth and a lot of leg room. Will definitely fly again.

IAH
LAS
Good 7.3

Seat was really hard and hurt to sit on after the first hour. Even had trouble sleeping it was so bad.

DSM
IAH
Excellent 10.0

Boarding seemed smother than usual. I had an issue with a large back pack that wouldn't fit in the overhead due to a smaller plane travelling to Houston from Des Moines, Flight attendant was extremely helpful as it was expensive camera equipment and was able to stow it so that i didn't have to check it at the door. Most appreciated their sensitivity.

Sat, Jan 13
ONT
MKE
6h 21m
Mon, Jan 15
MKE
ONT
24h 53m
Trip: 3 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32923 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MIA
ISP
Excellent 8.5

The terminal was empty. Plenty of seats. Boarding doesn't take long. Arrival at ISP is nice because it is small and empty.

PVD
TPA
Excellent 9.3

Cheap, comfortable and friendly staff

Getting off the plane took forever on both legs.

MIA
CVG
Good 6.0

More snack/food options

LGA
MIA
Mediocre 3.6

Flight Very late , when departure already at night Uncomfortable seats $45 for a bag and I have drop it off myself after pay

MCO
DEN
Okay 4.6

The seats were clean; the cabin looked very nice. The plane got me from point A to B safely. smoothest Lansing ever!

Flight was delayed 2.5 hours. No communication from the cockpit, 2 out of the 4 flight attendants we really crabby. Undersea storage was unusually small. I’m 5’8” and my knees were pressed against the seat in front of me and the seats are hard. My legs were numb for part of the trip.

Wed, Jan 3
ONT
MKE
5h 41m
Fri, Jan 5
MKE
ONT
15h 54m
Trip: 3 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32923 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PVD
TPA
Excellent 9.3

Cheap, comfortable and friendly staff

Getting off the plane took forever on both legs.

PBI
ISP
Mediocre 2.0

Was unable to make it

MIA
CVG
Good 6.0

More snack/food options

DEN
SLC
Okay 5.6

Food, entertainment NA, didn’t use. Rest of flight uneventful, happy to say. Because this was so late due to previous leg of journey delayed, our planned transportation to hotel wa not available.

DEN
ORD
Excellent 10.0

On time. Very organized.

Thu, Apr 26
ONT
MKE
11h 24m
Sun, Apr 29
MKE
ONT
6h 18m
Trip: 4 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32923 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MIA
CVG
Good 6.0

More snack/food options

DEN
ORD
Excellent 10.0

On time. Very organized.

DEN
ORD
Okay 5.3

Low cost

They make you pay for everything. Even peanuts. No entertainment.

MIA
ISP
Excellent 8.5

The terminal was empty. Plenty of seats. Boarding doesn't take long. Arrival at ISP is nice because it is small and empty.

PVD
TPA
Excellent 9.3

Cheap, comfortable and friendly staff

Getting off the plane took forever on both legs.

Tue, May 22
ONT
MKE
5h 55m
Thu, May 31
MKE
ONT
5h 51m
Trip: 10 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 13528 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
JFK
LAX
Excellent 9.3

Check in was easy through their app. Also very quick lines to drop off bags. Crew was very nice and respectful

Seat are a little bit too close together. But overall very comfortable

LAX
GUA
Mediocre 2.0

Nothing worst flight I've ever had.

Everything Delta was so poor quality!!! The flight attendants were not helpful.

LGA
CVG
Excellent 8.3

Plane was far too tight. Very uncomfortable for taller individuals.

ATL
SNA
Excellent 8.0

4 hour flight. Non-eventful except slight turbulence. Good to be home! Thank you!

NA

CHA
ATL
Excellent 10.0

On time departure and arrival. The Airbus plane has enough legroom for tall persons.

Thu, Nov 30
ONT
MKE
6h 31m
Mon, Dec 4
MKE
ONT
7h 26m
Trip: 5 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 51141 reviews
Overall
7.2
Boarding
7.3
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
JAX
IAH
Good 7.6

N/A

Seat was really hard and hurt to sit on after the first hour. Even had trouble sleeping it was so bad.

EWR
PBI
Okay 4.6

Arrived on time

Distance between gates

DCA
IAH
Good 7.3

Crew was great and helpful!

Not enough options for people with celiac.

DEN
LGA
Excellent 8.3

The crew did a good job with the sick woman.

NRT
LAX
Excellent 10.0

Service and food were great. Flight was smooth and a lot of leg room. Will definitely fly again.

Fri, Mar 9
ONT
MKE
5h 28m
Sun, Mar 11
MKE
ONT
6h 24m
Trip: 3 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 25178 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
LAX
MIA
Good 7.6

Movies, clean, efficient

Paying of my small Checked bag

CHO
ORD
Good 7.6

It was a little hot in the plane at during start and touchdown

JUL
LIM
Okay 4.0

The bag search was very thorough and many employees were wearing their Peru jerseys under their uniforms.

Everything else. Flight was delayed almost four hours with no explanation. Received multiple calls from Avianca but all in Spanish until fifth one in English hung up once we confirmed we understood there was a delay. Staff communicated different directions. Only one cafe to wait in. Substitute breakfast served was underwhelming. Plane was incredibly dated with life vests strewn about/not tucked away. Upon deboarding, incredibly unclear that we had to completely exit and go back through security, meaning we had no time between flights for the restroom or to buy water.

BDL
CLT
Okay 4.0

No baggage controls from seat 18 to 28 no bags would fit. As we exited all the front rows we're waiting to get there bags stored in back of planes overhead bins. That's just not right, especially when they charge us extra to take a bag for overhead bins storage.

SAL
MIA
Excellent 8.6

There was no individual entertainment on board (TV’s, internet, etc)

Sun, Dec 17
ONT
MKE
21h 21m
Fri, Dec 29
MKE
ONT
17h 22m
Trip: 13 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 32923 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MIA
PHL
Okay 5.6

Flight was on time. The flight was fast and the crew was helpful and courteous

It was cramped. Couldn't recline back. Was only offered water

PVD
TPA
Excellent 9.3

Cheap, comfortable and friendly staff

Getting off the plane took forever on both legs.

MCO
DEN
Okay 4.6

The seats were clean; the cabin looked very nice. The plane got me from point A to B safely. smoothest Lansing ever!

Flight was delayed 2.5 hours. No communication from the cockpit, 2 out of the 4 flight attendants we really crabby. Undersea storage was unusually small. I’m 5’8” and my knees were pressed against the seat in front of me and the seats are hard. My legs were numb for part of the trip.

DEN
ORD
Excellent 10.0

On time. Very organized.

MIA
ISP
Excellent 8.5

The terminal was empty. Plenty of seats. Boarding doesn't take long. Arrival at ISP is nice because it is small and empty.

Mon, Dec 25
ONT
MKE
6h 15m
Sat, Dec 30
MKE
ONT
6h 45m
Trip: 6 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 25178 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
CHO
ORD
Good 7.6

It was a little hot in the plane at during start and touchdown

PHL
PHX
Okay 5.0

Arrived safely and on time.

No power outlets at seats.

LAX
MIA
Good 7.6

Movies, clean, efficient

Paying of my small Checked bag

BDL
CLT
Okay 4.0

No baggage controls from seat 18 to 28 no bags would fit. As we exited all the front rows we're waiting to get there bags stored in back of planes overhead bins. That's just not right, especially when they charge us extra to take a bag for overhead bins storage.

MBJ
PHL
Excellent 8.6

AA flight was relaxed and smooth, crew was respectful and warm can’t think

Can’t think of anything I didn’t like

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