Chicago (ORD) to Lisbon (LIS) cheap flight deal from $3723 USD in first class

BABritish Airways

Round Trip•First Class

ORD

O'Hare International Airport

Chicago, United States

LIS

Portela Airport

Lisbon, Portugal

$9,080 USD

-59%$3,723 USD

Verified Sep 19, 2025 at 11:17 AM

September 2025

Today

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19$16,656 20$9,203 21$10,403 22$9,203 23$8,953 24$16,178 25$16,178 26$9,531 27$9,531 28$15,406 29$11,403 30$14,007 1$14,778 2$10,103 3$13,703 4$8,503 5$8,503

Extremely Rare Availability

2% of dates checked are available within 10% of the lowest price

Monday, September 29th, 2025

10 round-trip options

Returning

Sat, Oct 4, 2025•5 Day Trip

$12,903 USD

Google Flights

Returning

Sun, Oct 5, 2025•6 Day Trip

$15,445 USD

Google Flights

Returning

Mon, Oct 6, 2025•7 Day Trip

$15,406 USD

Google Flights

Returning

Tue, Oct 7, 2025•8 Day Trip

$15,406 USD

Google Flights

Returning

Wed, Oct 8, 2025•9 Day Trip

$15,406 USD

Google Flights

Returning

Thu, Oct 9, 2025•10 Day Trip

$11,403 USD

Google Flights

Returning

Fri, Oct 10, 2025•11 Day Trip

$15,406 USD

Google Flights

Returning

Sat, Oct 11, 2025•12 Day Trip

$15,406 USD

Google Flights

Returning

Sun, Oct 12, 2025•13 Day Trip

$15,181 USD

Google Flights

Returning

Mon, Oct 13, 2025•14 Day Trip

$15,153 USD

Google Flights