United Flight 5559 Deals & Information (2026/2027)

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United Flight 5559 Route Deals From $107

The cheapest prices found with in the last 7 days for return flights were $209 and $107 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jan 6 - Sat, Jan 9
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$209 Roundtrip, found 20 hours ago
$209
Roundtrip
found 20 hours ago
Select United flight, departing Wed, Jan 6 from General Mitchell Intl. to O'Hare Intl., returning Sat, Jan 9, priced at $209 found 20 hours ago
Sun, Jan 17 - Fri, Jan 22
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$239 Roundtrip, found 4 days ago
$239
Roundtrip
found 4 days ago
Select United flight, departing Sun, Jan 17 from General Mitchell Intl. to O'Hare Intl., returning Fri, Jan 22, priced at $239 found 4 days ago
Wed, Nov 25 - Sun, Nov 29
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$249 Roundtrip, found 5 days ago
$249
Roundtrip
found 5 days ago
Select United flight, departing Wed, Nov 25 from General Mitchell Intl. to O'Hare Intl., returning Sun, Nov 29, priced at $249 found 5 days ago
Wed, Nov 25 - Sun, Nov 29
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$263 Roundtrip, found 5 days ago
$263
Roundtrip
found 5 days ago
Select United flight, departing Wed, Nov 25 from General Mitchell Intl. to O'Hare Intl., returning Sun, Nov 29, priced at $263 found 5 days ago
Sat, Nov 21 - Sun, Nov 29
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$266 Roundtrip, found 6 days ago
$266
Roundtrip
found 6 days ago
Select United flight, departing Sat, Nov 21 from General Mitchell Intl. to O'Hare Intl., returning Sun, Nov 29, priced at $266 found 6 days ago
Sat, Nov 21 - Sun, Nov 29
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$271 Roundtrip, found 6 days ago
$271
Roundtrip
found 6 days ago
Select United flight, departing Sat, Nov 21 from General Mitchell Intl. to O'Hare Intl., returning Sun, Nov 29, priced at $271 found 6 days ago
Sun, Oct 18 - Mon, Oct 19
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$272 Roundtrip, found 1 day ago
$272
Roundtrip
found 1 day ago
Select United flight, departing Sun, Oct 18 from General Mitchell Intl. to O'Hare Intl., returning Mon, Oct 19, priced at $272 found 1 day ago
Sat, Nov 21 - Sun, Nov 29
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$277 Roundtrip, found 6 days ago
$277
Roundtrip
found 6 days ago
Select United flight, departing Sat, Nov 21 from General Mitchell Intl. to O'Hare Intl., returning Sun, Nov 29, priced at $277 found 6 days ago
Sun, Oct 18 - Mon, Oct 19
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$282 Roundtrip, found 1 day ago
$282
Roundtrip
found 1 day ago
Select United flight, departing Sun, Oct 18 from General Mitchell Intl. to O'Hare Intl., returning Mon, Oct 19, priced at $282 found 1 day ago
Sun, Jan 17 - Fri, Jan 22
MKE
General Mitchell Intl.
ORD
O'Hare Intl.
$284 Roundtrip, found 4 days ago
$284
Roundtrip
found 4 days ago
Select United flight, departing Sun, Jan 17 from General Mitchell Intl. to O'Hare Intl., returning Fri, Jan 22, priced at $284 found 4 days ago

Frequently asked questions

What route does flight number UA5559 take?
UA5559 is used on multiple routes, but the most common is between Denver Intl. Airport (DEN) and Sun Valley, ID Airport (SUN-Friedman Memorial). If you're lucky enough to score a direct flight, you'll disembark the plane in approximately 1 hour and 55 minutes. Multi-stop flights can also travel under the same number, as can flights on other routes.
What kind of plane is on flight number UA5559?
It's more than likely you'll be climbing aboard an Embraer 175 if you've reserved a ticket on flight UA5559 from DIA airport to SUN. It's the most commonly used aircraft model on this route.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA5559 flight with Travelocity, please visit our Customer Service Portal.