United Flight 558 Deals & Information (2026/2027)

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United Flight 558 Route Deals From $97

The cheapest prices found with in the last 7 days for return flights were $158 and $97 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 29 - Wed, Oct 7
DEN
Denver Intl.
BOS
Logan Intl.
$158 Roundtrip, found 5 days ago
$158
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 29 from Denver Intl. to Logan Intl., returning Wed, Oct 7, priced at $158 found 5 days ago
Tue, Sep 29 - Wed, Oct 7
DEN
Denver Intl.
BOS
Logan Intl.
$186 Roundtrip, found 5 days ago
$186
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 29 from Denver Intl. to Logan Intl., returning Wed, Oct 7, priced at $186 found 5 days ago
Tue, Aug 4 - Wed, Aug 12
DEN
Denver Intl.
BOS
Logan Intl.
$206 Roundtrip, found 2 days ago
$206
Roundtrip
found 2 days ago
Select United flight, departing Tue, Aug 4 from Denver Intl. to Logan Intl., returning Wed, Aug 12, priced at $206 found 2 days ago
Wed, Sep 16 - Tue, Sep 22
DEN
Denver Intl.
BOS
Logan Intl.
$219 Roundtrip, found 2 hours ago
$219
Roundtrip
found 2 hours ago
Select United flight, departing Wed, Sep 16 from Denver Intl. to Logan Intl., returning Tue, Sep 22, priced at $219 found 2 hours ago
Tue, Sep 1 - Sat, Sep 12
DEN
Denver Intl.
BOS
Logan Intl.
$225 Roundtrip, found 7 hours ago
$225
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Sep 1 from Denver Intl. to Logan Intl., returning Sat, Sep 12, priced at $225 found 7 hours ago
Tue, Sep 1 - Sat, Sep 12
DEN
Denver Intl.
BOS
Logan Intl.
$235 Roundtrip, found 7 hours ago
$235
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Sep 1 from Denver Intl. to Logan Intl., returning Sat, Sep 12, priced at $235 found 7 hours ago
Tue, Sep 1 - Sat, Sep 12
DEN
Denver Intl.
BOS
Logan Intl.
$237 Roundtrip, found 7 hours ago
$237
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Sep 1 from Denver Intl. to Logan Intl., returning Sat, Sep 12, priced at $237 found 7 hours ago
Wed, Sep 16 - Tue, Sep 22
DEN
Denver Intl.
BOS
Logan Intl.
$241 Roundtrip, found 2 hours ago
$241
Roundtrip
found 2 hours ago
Select United flight, departing Wed, Sep 16 from Denver Intl. to Logan Intl., returning Tue, Sep 22, priced at $241 found 2 hours ago