United Flight 503 Deals & Information (2026/2027)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

United Flight 503 Route Deals From $98

The cheapest prices found with in the last 7 days for return flights were $187 and $98 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, May 16 - Tue, May 19
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$187 Roundtrip, found 2 days ago
$187
Roundtrip
found 2 days ago
Select United flight, departing Sat, May 16 from Newark Liberty Intl. Airport to Logan Intl., returning Tue, May 19, priced at $187 found 2 days ago
Sat, Jul 18 - Sun, Jul 19
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$188 Roundtrip, found 1 day ago
$188
Roundtrip
found 1 day ago
Select United flight, departing Sat, Jul 18 from Newark Liberty Intl. Airport to Logan Intl., returning Sun, Jul 19, priced at $188 found 1 day ago
Mon, Aug 10 - Sun, Aug 16
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$190 Roundtrip, found 21 hours ago
$190
Roundtrip
found 21 hours ago
Select United flight, departing Mon, Aug 10 from Newark Liberty Intl. Airport to Logan Intl., returning Sun, Aug 16, priced at $190 found 21 hours ago
Wed, Jul 22 - Thu, Jul 23
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$193 Roundtrip, found 4 days ago
$193
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jul 22 from Newark Liberty Intl. Airport to Logan Intl., returning Thu, Jul 23, priced at $193 found 4 days ago
Thu, Jun 11 - Sat, Jun 13
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$202 Roundtrip, found 3 days ago
$202
Roundtrip
found 3 days ago
Select United flight, departing Thu, Jun 11 from Newark Liberty Intl. Airport to Logan Intl., returning Sat, Jun 13, priced at $202 found 3 days ago
Mon, Aug 10 - Sun, Aug 16
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$210 Roundtrip, found 21 hours ago
$210
Roundtrip
found 21 hours ago
Select United flight, departing Mon, Aug 10 from Newark Liberty Intl. Airport to Logan Intl., returning Sun, Aug 16, priced at $210 found 21 hours ago
Thu, Jul 16 - Mon, Jul 20
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$213 Roundtrip, found 2 days ago
$213
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jul 16 from Newark Liberty Intl. Airport to Logan Intl., returning Mon, Jul 20, priced at $213 found 2 days ago
Sat, Jul 18 - Sun, Jul 19
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$214 Roundtrip, found 1 day ago
$214
Roundtrip
found 1 day ago
Select United flight, departing Sat, Jul 18 from Newark Liberty Intl. Airport to Logan Intl., returning Sun, Jul 19, priced at $214 found 1 day ago
Fri, Jun 5 - Sun, Jun 7
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$217 Roundtrip, found 14 hours ago
$217
Roundtrip
found 14 hours ago
Select United flight, departing Fri, Jun 5 from Newark Liberty Intl. Airport to Logan Intl., returning Sun, Jun 7, priced at $217 found 14 hours ago
Thu, Jun 18 - Thu, Jun 25
EWR
Newark Liberty Intl. Airport
BOS
Logan Intl.
$219 Roundtrip, found 14 hours ago
$219
Roundtrip
found 14 hours ago
Select United flight, departing Thu, Jun 18 from Newark Liberty Intl. Airport to Logan Intl., returning Thu, Jun 25, priced at $219 found 14 hours ago

Frequently asked questions

What route does flight number UA503 take?
UA503 flies straight from IAH to Tampa Intl. Airport (TPA) in about 2 hours and 7 minutes. It can sometimes take other routes though, some of which could be multi-stop trips. Keep this in mind when locking in your seat to avoid any mix-ups.
What terminal does UA503 fly out of?
Terminal C is where you'll likely take off from if you're booked on a flight out of Houston Airport. George Bush Intercontinental Airport (IAH) to TPA is the most commonly traveled route for flight number UA503.
What kind of plane is on flight number UA503?
It's highly likely you'll be hopping on board an Airbus A319 if you're on flight UA503 from Houston, TX Airport (IAH-George Bush Intercontinental) to Tampa, FL Airport (TPA-Tampa Intl.). It's the most commonly used aircraft on this busy route.
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 UA503 flight with Travelocity, please visit our Customer Service Portal.