United Flight 6640 Deals & Information (2026/2027)

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United Flight 6640 Route Deals From $203

The cheapest prices found with in the last 7 days for return flights were $421 and $203 for one-way flights to Pearson Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Jun 28 - Wed, Jul 1
SAT
San Antonio Intl.
YYZ
Pearson Intl.
$421 Roundtrip, found 8 hours ago
$421
Roundtrip
found 8 hours ago
Select United flight, departing Sun, Jun 28 from San Antonio Intl. to Pearson Intl., returning Wed, Jul 1, priced at $421 found 8 hours ago
Mon, Jun 8 - Mon, Jun 15
SAT
San Antonio Intl.
YYZ
Pearson Intl.
$489 Roundtrip, found 5 days ago
$489
Roundtrip
found 5 days ago
Select United flight, departing Mon, Jun 8 from San Antonio Intl. to Pearson Intl., returning Mon, Jun 15, priced at $489 found 5 days ago
Sun, Jun 28 - Wed, Jul 1
SAT
San Antonio Intl.
YYZ
Pearson Intl.
$510 Roundtrip, found 8 hours ago
$510
Roundtrip
found 8 hours ago
Select United flight, departing Sun, Jun 28 from San Antonio Intl. to Pearson Intl., returning Wed, Jul 1, priced at $510 found 8 hours ago
Sun, Jun 28 - Wed, Jul 1
SAT
San Antonio Intl.
YYZ
Pearson Intl.
$514 Roundtrip, found 8 hours ago
$514
Roundtrip
found 8 hours ago
Select United flight, departing Sun, Jun 28 from San Antonio Intl. to Pearson Intl., returning Wed, Jul 1, priced at $514 found 8 hours ago
Sun, Aug 9 - Mon, Aug 10
SAT
San Antonio Intl.
YYZ
Pearson Intl.
$520 Roundtrip, found 5 days ago
$520
Roundtrip
found 5 days ago
Select United flight, departing Sun, Aug 9 from San Antonio Intl. to Pearson Intl., returning Mon, Aug 10, priced at $520 found 5 days ago
Sun, Jun 28 - Wed, Jul 1
SAT
San Antonio Intl.
YYZ
Pearson Intl.
$525 Roundtrip, found 8 hours ago
$525
Roundtrip
found 8 hours ago
Select United flight, departing Sun, Jun 28 from San Antonio Intl. to Pearson Intl., returning Wed, Jul 1, priced at $525 found 8 hours ago