Chicago has two main airports: O'Hare, a major hub to the northwest, and Midway on the southwest side. Both have direct CTA 'L' train service to the Loop. Winters are cold and summers are warm and humid.
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17 miles (27 km) from the city centre. 84.9 million passengers in 2025
| How | Route | Time | Cost |
|---|---|---|---|
| Train | CTA Blue Line to the Loop, runs 24 hours | about 42m | $5 |
12 miles (19 km) from the city centre. 19.4 million passengers in 2025
| How | Route | Time | Cost |
|---|---|---|---|
| Train | CTA Orange Line to the Loop (all day, not overnight) | about 22m | $2.50 |
Domestic travel within the United States: no passport or visa is needed, but adults must show a REAL ID-compliant license or another accepted ID at airport security.
Since May 7, 2025, every air traveler 18 or older needs a REAL ID-compliant driver's license, an enhanced driver's license, a valid passport, or another TSA-accepted ID to fly within the US. Travelers without acceptable ID are denied passage through the checkpoint. REAL ID cards show a star at the top.
Late spring through early autumn is warmest, with average highs of 71-85F from May to August; winters are cold, with January highs near 32F.
| Month | Avg high | Avg low |
|---|---|---|
| Jan | 32°F (0°C) | 19°F (-7°C) |
| Feb | 36°F (2°C) | 23°F (-5°C) |
| Mar | 48°F (9°C) | 32°F (0°C) |
| Apr | 60°F (16°C) | 42°F (6°C) |
| May | 71°F (22°C) | 52°F (11°C) |
| Jun | 81°F (27°C) | 63°F (17°C) |
| Jul | 85°F (29°C) | 68°F (20°C) |
| Aug | 83°F (28°C) | 66°F (19°C) |
| Sep | 76°F (24°C) | 58°F (14°C) |
| Oct | 64°F (18°C) | 46°F (8°C) |
| Nov | 50°F (10°C) | 35°F (2°C) |
| Dec | 38°F (3°C) | 25°F (-4°C) |
Chicago is served by O'Hare International Airport (ORD) and Midway International Airport (MDW). O'Hare International Airport handled about 84.9 million passengers in 2025.
Domestic travel within the United States: no passport or visa is needed, but adults must show a REAL ID-compliant license or another accepted ID at airport security. Since May 7, 2025, every air traveler 18 or older needs a REAL ID-compliant driver's license, an enhanced driver's license, a valid passport, or another TSA-accepted ID to fly within the US. Travelers without acceptable ID are denied passage through the checkpoint. REAL ID cards show a star at the top.
Late spring through early autumn is warmest, with average highs of 71-85F from May to August; winters are cold, with January highs near 32F.
CTA Blue Line to the Loop, runs 24 hours, about 42 minutes, $5.
Chicago uses the US dollar (USD).
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Information checked in October 2026. Schedules, fares and entry rules change, so confirm with the airline or the official source before you travel.