United Flight 1866 Deals & Information (2026/2027)

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United Flight 1866 Route Deals From $80

The cheapest prices found with in the last 7 days for return flights were $157 and $80 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Sep 9 - Sat, Sep 12
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$157 Roundtrip, found 9 hours ago
$157
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Sep 9 from Gerald R. Ford Intl. to O'Hare Intl., returning Sat, Sep 12, priced at $157 found 9 hours ago
Sat, Jul 25 - Wed, Jul 29
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$161 Roundtrip, found 12 hours ago
$161
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Jul 25 from Gerald R. Ford Intl. to O'Hare Intl., returning Wed, Jul 29, priced at $161 found 12 hours ago
Wed, Sep 9 - Sat, Sep 12
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$183 Roundtrip, found 9 hours ago
$183
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Sep 9 from Gerald R. Ford Intl. to O'Hare Intl., returning Sat, Sep 12, priced at $183 found 9 hours ago
Sat, Jul 25 - Wed, Jul 29
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$187 Roundtrip, found 12 hours ago
$187
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Jul 25 from Gerald R. Ford Intl. to O'Hare Intl., returning Wed, Jul 29, priced at $187 found 12 hours ago
Sat, Jul 25 - Wed, Jul 29
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$188 Roundtrip, found 12 hours ago
$188
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Jul 25 from Gerald R. Ford Intl. to O'Hare Intl., returning Wed, Jul 29, priced at $188 found 12 hours ago
Thu, Sep 10 - Mon, Sep 14
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$195 Roundtrip, found 11 hours ago
$195
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Sep 10 from Gerald R. Ford Intl. to O'Hare Intl., returning Mon, Sep 14, priced at $195 found 11 hours ago
Wed, Sep 9 - Sat, Sep 12
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$209 Roundtrip, found 9 hours ago
$209
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Sep 9 from Gerald R. Ford Intl. to O'Hare Intl., returning Sat, Sep 12, priced at $209 found 9 hours ago
Wed, Oct 14 - Sat, Oct 17
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$211 Roundtrip, found 3 days ago
$211
Roundtrip
found 3 days ago
Select United flight, departing Wed, Oct 14 from Gerald R. Ford Intl. to O'Hare Intl., returning Sat, Oct 17, priced at $211 found 3 days ago
Sat, Jul 25 - Wed, Jul 29
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$215 Roundtrip, found 12 hours ago
$215
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Jul 25 from Gerald R. Ford Intl. to O'Hare Intl., returning Wed, Jul 29, priced at $215 found 12 hours ago
Wed, Sep 9 - Sat, Sep 12
GRR
Gerald R. Ford Intl.
ORD
O'Hare Intl.
$218 Roundtrip, found 9 hours ago
$218
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Sep 9 from Gerald R. Ford Intl. to O'Hare Intl., returning Sat, Sep 12, priced at $218 found 9 hours ago

Frequently asked questions

What route does flight number UA1866 take?
Flight number UA1866 flies straight from Denver, CO Airport (DEN-Denver Intl.) to PHX. During this trip, you'll be in the air for 1 hour and 54 minutes. Book ahead to lock in your favorite seat.
How often is UA1866 on time?
About 81% of UA1866 flights head off on time — so if you're traveling between Denver, CO Airport (DEN-Denver Intl.) and Sky Harbor Intl. Airport (PHX), you can breathe easy knowing that you'll reach your destination as quickly as possible. If this United Airlines flight runs behind time, the average wait is approximately 19 minutes. Thanks to the carrier's first-rate service, this route has a star rating of 2.75.
What kind of plane is on flight number UA1866?
Expect to hop on board a Boeing 737 MAX 9 if you're traveling on flight UA1866. Nearly all services from DIA airport to Phoenix Sky Harbor Intl. Airport are operated using this aircraft type.
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 UA1866 flight with Travelocity, please visit our Customer Service Portal.