Ontario (ONT) to Lisbon (LIS) cheap flight deal from $505 USD in economy class – flightdeals.net

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American Airlines

AAAmerican Airlines

Iberia Airlines

IBIberia Airlines

Round Trip•Economy

Ontario International Airport

Ontario, United States

Portela Airport

Lisbon, Portugal

$928 USD

-46%$505 USD

Verified Sep 21, 2025 at 4:49 PM

September 2025

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21$1,386 22$1,386 23$1,536 24$1,536 25$1,596 26$1,595 27$1,536 28$629 29$628 30$842 1$1,142 2$1,002 3$1,002 4$1,134 5$948

Limited Availability

12% of dates checked are available within 10% of the lowest price

Thursday, September 4th, 2025

0 round-trip options

No flight details available for this date.