United Flight 558 Deals & Information (2025/2026)

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United Flight 558 Route Deals From $121

The cheapest prices found with in the last 7 days for return flights were $217 and $121 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, May 1 - Tue, May 6
DEN
Denver Intl.
BOS
Logan Intl.
$217 Roundtrip, found 5 hours ago
$217
Roundtrip
found 5 hours ago
Select United flight, departing Thu, May 1 from Denver Intl. to Logan Intl., returning Tue, May 6, priced at $217 found 5 hours ago
Wed, May 7 - Tue, Jun 3
DEN
Denver Intl.
BOS
Logan Intl.
$225 Roundtrip, found 4 hours ago
$225
Roundtrip
found 4 hours ago
Select United flight, departing Wed, May 7 from Denver Intl. to Logan Intl., returning Tue, Jun 3, priced at $225 found 4 hours ago
Sat, May 3 - Thu, May 29
DEN
Denver Intl.
BOS
Logan Intl.
$229 Roundtrip, found 2 hours ago
$229
Roundtrip
found 2 hours ago
Select United flight, departing Sat, May 3 from Denver Intl. to Logan Intl., returning Thu, May 29, priced at $229 found 2 hours ago
Fri, Jul 4 - Sat, Jul 12
DEN
Denver Intl.
BOS
Logan Intl.
$231 Roundtrip, found 4 hours ago
$231
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Jul 4 from Denver Intl. to Logan Intl., returning Sat, Jul 12, priced at $231 found 4 hours ago
Mon, Aug 18 - Wed, Aug 27
DEN
Denver Intl.
BOS
Logan Intl.
$236 Roundtrip, found 16 hours ago
$236
Roundtrip
found 16 hours ago
Select United flight, departing Mon, Aug 18 from Denver Intl. to Logan Intl., returning Wed, Aug 27, priced at $236 found 16 hours ago
Sat, May 17 - Wed, May 21
DEN
Denver Intl.
BOS
Logan Intl.
$240 Roundtrip, found 17 hours ago
$240
Roundtrip
found 17 hours ago
Select United flight, departing Sat, May 17 from Denver Intl. to Logan Intl., returning Wed, May 21, priced at $240 found 17 hours ago
Fri, Jun 27 - Mon, Jun 30
DEN
Denver Intl.
BOS
Logan Intl.
$241 Roundtrip, found 1 hour ago
$241
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jun 27 from Denver Intl. to Logan Intl., returning Mon, Jun 30, priced at $241 found 1 hour ago