United Flight AA1851 Deals & Information (2025/2026)

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United Flight 1851 Route Deals From $99

The cheapest prices found with in the last 7 days for return flights were $209 and $99 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Nov 18 - Sat, Nov 22
BTV
Burlington Intl.
ORD
O'Hare Intl.
$209 Roundtrip, found 3 days ago
$209
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 18 from Burlington Intl. to O'Hare Intl., returning Sat, Nov 22, priced at $209 found 3 days ago
Fri, Aug 29 - Mon, Sep 1
BTV
Burlington Intl.
ORD
O'Hare Intl.
$215 Roundtrip, found 9 hours ago
$215
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Aug 29 from Burlington Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $215 found 9 hours ago
Fri, Aug 29 - Mon, Sep 1
BTV
Burlington Intl.
ORD
O'Hare Intl.
$228 Roundtrip, found 9 hours ago
$228
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Aug 29 from Burlington Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $228 found 9 hours ago
Fri, Sep 26 - Mon, Sep 29
BTV
Burlington Intl.
ORD
O'Hare Intl.
$237 Roundtrip, found 3 days ago
$237
Roundtrip
found 3 days ago
Select United flight, departing Fri, Sep 26 from Burlington Intl. to O'Hare Intl., returning Mon, Sep 29, priced at $237 found 3 days ago
Fri, Aug 29 - Mon, Sep 1
BTV
Burlington Intl.
ORD
O'Hare Intl.
$238 Roundtrip, found 9 hours ago
$238
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Aug 29 from Burlington Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $238 found 9 hours ago
Tue, Nov 18 - Sat, Nov 22
BTV
Burlington Intl.
ORD
O'Hare Intl.
$239 Roundtrip, found 3 days ago
$239
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 18 from Burlington Intl. to O'Hare Intl., returning Sat, Nov 22, priced at $239 found 3 days ago
Fri, Aug 29 - Mon, Sep 1
BTV
Burlington Intl.
ORD
O'Hare Intl.
$242 Roundtrip, found 9 hours ago
$242
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Aug 29 from Burlington Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $242 found 9 hours ago
Fri, Sep 26 - Mon, Sep 29
BTV
Burlington Intl.
ORD
O'Hare Intl.
$246 Roundtrip, found 3 days ago
$246
Roundtrip
found 3 days ago
Select United flight, departing Fri, Sep 26 from Burlington Intl. to O'Hare Intl., returning Mon, Sep 29, priced at $246 found 3 days ago
Fri, Sep 26 - Mon, Sep 29
BTV
Burlington Intl.
ORD
O'Hare Intl.
$247 Roundtrip, found 3 days ago
$247
Roundtrip
found 3 days ago
Select United flight, departing Fri, Sep 26 from Burlington Intl. to O'Hare Intl., returning Mon, Sep 29, priced at $247 found 3 days ago
Wed, Aug 6 - Wed, Aug 13
BTV
Burlington Intl.
ORD
O'Hare Intl.
$248 Roundtrip, found 9 hours ago
$248
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Aug 6 from Burlington Intl. to O'Hare Intl., returning Wed, Aug 13, priced at $248 found 9 hours ago