United Flight 631 Deals & Information (2025/2026)

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United Flight 631 Route Deals From $96

The cheapest prices found with in the last 7 days for return flights were $191 and $96 for one-way flights to Newark Liberty Intl. Airport for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jan 17 - Sun, Jan 18
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$191 Roundtrip, found 1 day ago
$191
Roundtrip
found 1 day ago
Select United flight, departing Sat, Jan 17 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Sun, Jan 18, priced at $191 found 1 day ago
Sat, Feb 14 - Wed, Feb 18
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$194 Roundtrip, found 3 days ago
$194
Roundtrip
found 3 days ago
Select United flight, departing Sat, Feb 14 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Wed, Feb 18, priced at $194 found 3 days ago
Sat, Jan 17 - Sun, Jan 18
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$197 Roundtrip, found 1 day ago
$197
Roundtrip
found 1 day ago
Select United flight, departing Sat, Jan 17 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Sun, Jan 18, priced at $197 found 1 day ago
Wed, Dec 24 - Tue, Jan 27
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$199 Roundtrip, found 9 hours ago
$199
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Dec 24 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Tue, Jan 27, priced at $199 found 9 hours ago
Thu, Dec 25 - Wed, Dec 31
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$201 Roundtrip, found 1 day ago
$201
Roundtrip
found 1 day ago
Select United flight, departing Thu, Dec 25 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Wed, Dec 31, priced at $201 found 1 day ago
Wed, Dec 24 - Mon, Jan 19
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$205 Roundtrip, found 11 hours ago
$205
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Dec 24 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Mon, Jan 19, priced at $205 found 11 hours ago
Wed, Dec 3 - Sun, Dec 7
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$205 Roundtrip, found 17 hours ago
$205
Roundtrip
found 17 hours ago
Select United flight, departing Wed, Dec 3 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Sun, Dec 7, priced at $205 found 17 hours ago
Wed, Dec 24 - Tue, Jan 27
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$209 Roundtrip, found 9 hours ago
$209
Roundtrip
found 9 hours ago
Select United flight, departing Wed, Dec 24 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Tue, Jan 27, priced at $209 found 9 hours ago
Sat, Feb 14 - Wed, Feb 18
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$211 Roundtrip, found 3 days ago
$211
Roundtrip
found 3 days ago
Select United flight, departing Sat, Feb 14 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Wed, Feb 18, priced at $211 found 3 days ago
Sat, Dec 13 - Sun, Dec 14
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$212 Roundtrip, found 7 hours ago
$212
Roundtrip
found 7 hours ago
Select United flight, departing Sat, Dec 13 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Sun, Dec 14, priced at $212 found 7 hours ago
Sat, Feb 14 - Wed, Feb 18
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$214 Roundtrip, found 3 days ago
$214
Roundtrip
found 3 days ago
Select United flight, departing Sat, Feb 14 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Wed, Feb 18, priced at $214 found 3 days ago
Thu, Jan 22 - Fri, Jan 23
PHX
Sky Harbor Intl.
EWR
Newark Liberty Intl. Airport
$217 Roundtrip, found 9 hours ago
$217
Roundtrip
found 9 hours ago
Select United flight, departing Thu, Jan 22 from Sky Harbor Intl. to Newark Liberty Intl. Airport, returning Fri, Jan 23, priced at $217 found 9 hours ago